---Mr. Wang, I have trouble ______the test.---Remember ________ it three times at least.to understand; readingB. understanding; ReadingC. understanding; to readD. to understand; to understand
The teacher asked the students________________.
______ ways to get on well with your classmates, or you will make yourself very lonely.
Oh, dear! There isn’t enough _____ for us in the lift. Let’s wait for the next.
I first met Lisa three years ago. She ________ at a radio shop at the time.
. As a volunteer, he often goes to the hospital to ________ the sick.