B ) 39.It was the third time that I _______ in at his office.A.have dropped B.had dropped C.dro

B ) 39.It was the third time that I _______ in at his office.A.have dropped B.had dropped C.dro
B ) 39.It was the third time that I _______ in at his office.
A.have dropped B.had dropped C.dropped D.was dropping
( A ) 41.The flowers want _______.Look,the soil is so dry.
A.watering B.being watered C.to water D.waters
( D ) 48.Would you _______ your voice a little so that everyone can hear you?
A.rise B.put C.lift D.raise
( D ) 49.More and more people began to _______ that good health means good wealth.
A.learn B.understand C.consider D.realize