—Hi, Tom, why are you looking so tired?
—I'm tried. Because I ______ the living room all day.
A. painted B. have been painting
C. have painted D. had painted
__________ is troubling me is __________ I don’t understand __________ he said.
A. What; that; what B. It; that; what
C. That; that; what D. what; that; which
______________________, I would have given you his address.
A. If you asked me
B. You had asked me
C. Should you have asked me
D. Had you asked me
As a teacher, he knows exactly how to his ideas to the students.
A. consult B. display
C. convey D. comfort
________ you can finish the task on time, it doesn't matter how you do it.
A．So long as B．As soon as
C．As well as D．So far as
I was really worried about you. You _______________ home without a word.
A. mustn’t leave B. shouldn’t have left
C. couldn’t have left D. needn’t leave
