In ancient time, textbook was the most (a) resource thing for the students. Teachers were the only guides and source of information. The students had to collect all the information from the lecture of their (b) teach. There was no guide book or other reference books in the market. During that period, a teacher had to deliver a lecture by (c) study the textbook. Because of the situation the students used to depend on the teachers (d) complete. As a result there was a great relation between a (c) teach and a student. Their popularity existed among the students in the society.

Rangamati is one of (a) the most attractive hilly districts of Bangladesh. It is located (b)at the western bank of Kaptai lake. Most of the visitors visit the place for its (c) X eye catching natural beauty. Nature has adorned this town (d) with all the elements of beauty. (e) The hills covered with green trees present (f) a unique sight. There are many tourist spots here. The suspension bridge of Rangamati is (g) an attraction for the tourists. It is also a home of several (h)X ethnic groups. (i)A trip to Rangamati would be (j)an outstanding experience for the nature lovers.

Bangladesh is a south (a)Asian country. It is blessed with (b)natural beauty. Natural resources abound in this country. Bangladesh (c) shares boundary with India and Myanmar. The three sides of the country are surrounded by these two (d) neighbours. The Bay of Bengal is (e) to the south of Bangladesh. The majority of the (f) large mangrove forest Sundarbans lies in this country. This forest is the (g)abode of the word famous Royal Bengal Tiger. A (h)number of rivers criss-crossed this forest. It is also a great (i)source of natural wealth. Bangladesh got her (j)independence through a nine month long freedom war.

a+ii+iii; =(a) Global warming + (ii) refers +(iii) to the increase in the temperature of the globe.

b+iii+i;  = (b) Irresponsible activities of human beings + (iii) are +(i) mainly responsible for it.

c+i+ii;   = (c) Sea level + (i) is rising + (ii) due to global warming.

d+v+vi; = (d) As a result, the coastal areas + (v) are going + (vi) to be vulnerable.

e+vi+iv; = (e) Using of renewable energy + (vi) can reduce + (iv) temperature rise to a great extent.

f+iv+v    = (f) So, world leaders' + (iv) must come +(v) to an agreement to fight against this disaster.

Washing hands regularly is (a) an  important activity. It keeps us safe (b) from corona-virus. How you wash your hand is also very (C) x important. First, you have to wet your hands (d) with clean, running water and apply soap. Then, rub your hands together with (e)  x  soap to create foam. Lather the backs of your hands, (f)  x your fingers and (g) x  Remember, you have to scrub your hands (h) x  at least 20 your nails. seconds. After that rinse your hands well with clean and running water. Finally, dry your hands using (i) a clean towel or tissue paper. Learn the process (j) of washing hands and also educate your friends about it.

The development of a nation is not (a) an easy task. It depends on the willingness (b) and sacrificing attitude of the valiants sons and (C) daughters of the soil. They don't work for (d) any appreciation or reward for themselves. Their vision (e) is to make the world a better place (f) to live in. They are always proud of (g) such selfless ventures. Their mission is to serve (h) the greater interest of humanity. They spend their (i) life for the welfare of people, the society (j) and the country as a whole.

Computers are used (a)in  many ways. For example, (b)a/x computer's memory may carry the names, addresses and flight numbers of air plane passengers. (c)A ticket agent can find (d)x almost instantly, by typing (e)a flight number, whether there is a seat available (f)in a particular plane. At flight time, the computer can make a list of all the passengers (g)of the plane. Computers can also solve many problems. (h)x many bits of information can be compared (i)to/with one another. Mathematical calculations can then be performed (j)through/with them.