The customer left the waiter a ________ tip because he had been especially friendly and helpful.
A. moderate B. liberal
C. handy D. conscious
（题文）When they got there, the village seemed deserted, the only sign of life ________ one or two dogs lying under some trees.
A. was B. were
C. being D. had been
I would have gone to visit him in the hotel had it been at all possible, but I ________ fully occupied.
A. were B. had been
C. have been D. was
Never before ________ the famous museum was just a stone's thro away from their school, so out ________.
A. had they known; went all they B. they had known; went all they
C. had they known; they all went D. they had known; they all went
We just wonder ________ bargaining enjoys a real love and great appreciation among many people.
A. why is it that B. what is it that
C. what it is that D. why it is that
We had better pay attention to some health problems that, when ________ in time, can become bigger ones later on.
A. not treated B. not to be treated
C. not having been treated D. not being treated
