_____ we have finished the course, we shall start doing more revision work.
---David,is that man your Chinese teacher?---It___________ be him.He’s having a meeting.
---Why weren’t you at the meeting?---I ____for a long distance call from my sister in America.
--- Perhaps we can go to the home for the elderly to do some voluntary work.----______ We should give the elderly a warm hand as often as possible.
--- How is your life in the countryside?-- It is _______ but sometimes I feel a bit _______.
---Which of the two books will you take ?--- I will take ________ and I think ________ of them is very important to me.