Sushovan Pal

  Exercise A: Fill in the blanks with can, could, may, might or must. Could you please explain it again?' I said to the teacher. (Polite request) I have called all of you so that we can discuss the matter openly. (Ability/Possibility) You might want to try this dress. I think it will look good on you. (Suggestion/Possibility) Divya said that she might go to visit her old aunt the next day. (Past possibility) It is quite late. The shops must be closed by now. (Probability based on evidence) ' May I ask a question?' Tiya said, interrupting her friend. (Formal permission) He might be busy. He is not taking calls. (Possibility) 'I can complete the work in three days,' said Mahesh. (Ability) The wedding may have to be postponed. The bride is not well. (Possibility) You don't look well. You might want to take the day off. (Suggestion) Exercise B: Complete these sentences with will or shall. Our players will perform well tomorrow, I'm sure. (Future tense...

  A. Choose the Correct Options 1.   A: Biogas is produced by decomposition of plant and animal waste (organic matter). B: Biogas is used as fuel to cook food. o     Answer : (c) Both A and B are chemical changes. §   Reason : Decomposition of organic matter (A) is a chemical change, and burning biogas (B) is also a chemical change (combustion). 2.   A change in which heat energy _______________ is called an endothermic change. o     Answer : (c) is absorbed 3.   A change that is useful for us is called a(n) _______________ change. o     Answer : (d) desirable 4.   _______________ is a chemical change. o     Answer : (b) Burning wood 5.   Ripening of fruits is a(n) _______________ change. o     Answer : (d) all of these (slow, irreversible, chemical) 6.   Amar has classified a few changes as given in the table. Which of them are classified incorrect...