Fill in the gaps with suitable prepositions, articles and zero article. For zero articles, use 'x' marks.

Covid-19 is (a) ----  infectious diseases which has taken away many lives (b) ---- the world. It has created economic crisis (c) ---- many countries of the world. Many people have lost their jobs. Many small traders compelled to leave their trades. No doubt, it is a great disaster (d) ------ the people of the world. Though the corona virus is very (e)----- deadly, it has created  awareness (f ) -------- mass people. Besides we have learnt many things (g) ----- it so far. Earlier, we were indifferent (h)-------  some rules of health and hygiene. Due to Covid-19, people of the world have become more conscious regarding the rules of health. Now a days, we try to maintain social distancing. We avoid (i)------- massive gatherings of people. We also have made a good  habit (j) --------- washing hands several times a day.

Fill in the gaps with the words from the box. Make any grammatical change if necessary. 

Language is a way of human communication. And the (a)------ to use any language is called the language skill. All (b)----- beings acquire this skill from their (c)-----  environment. That is, human babies begin (d) ---- acquire this language skill from just after their birth. If this process continues (e) ------ any obstruction, a baby can communicate with the people of the same language, (f) ---------within 3 to 4 years. During this period, the baby does not need to read or write (g) ------ for the language skill. The baby only goes (h) ----- listening, speaking picking up words. This process is called acquisition of language and this acquisition mostly takes (i) -----  while learning one's first language. We acquire the language skill of Bangla in this---------- .This is why. Bangla is called our first language.

Make six sentences using the parts of sentences from each column of the table below:

Complete the following text with right forms of verbs given in the box:

Rivers generally (a) ---from a mountain or a lake. They (b)----- very much important for our existence and economy. But unfortunately, we are (c) -------our rivers, choking it with toxic wastes from dyeing and textile factories. Most of the industries (d)------ waste treatment plants. These kinds of industries are (e)------releasing untreated liquid waste directly and (f)--------- the water polluted. Our unconscious people also (g) ----- different kinds of waste materials into the rivers directly. So to keep existence of fishes and other species (h)----- in the water is impossible. It is high time the government and the conscious people (i)-------- together to save the rivers. Otherwise a happy, prosperous and pollution free environment for the next generation can't be (j )-----.