He looked as though he _________ a ghost（鬼）.
#103810
A
saw
B
has seen
C
have seen
D
had seen
推荐题目
Great as Newton was, many of his ideas_____today and are being modified by the work of scientists of our time.
#104460
A
are to challenge
B
have challenged
C
are challenging
D
have been challenged
---- Do you live in this city?---- No, we ______ it for holidays.
#104108
A
just visit
B
just visited
C
are just visiting
D
have visited
The school board is made up of parents who ________ to make decisions about school affairs.
#100584
A
had been elected
B
had elected
C
have been elected
D
have elected
---Has your father returned from Africa yet? ---Yes, but he ____ here for only three days before his company sent him to Australia．
#103213
A
was
B
has been
C
will be
D
would be
—How long have you been in this office?—Just a few minutes. My cousins__________ here together with me.
#104311
A
have walked
B
had walked
C
walked
D
have been walking