Experiments of this kind _______in both the U.S. and Europe well before the Second World War started.
#100664
A
have conducted
B
have been conducted
C
had conducted
D
had been conducted
推荐题目
---How can you keep slim as a mother of two sons?---I _______ in the gym for years.
#102426
A
have worked out
B
have been working out
C
have worked on
D
have been working on
I felt very tired when I got home, and I ______ straight to bed.
#100582
A
go
B
went
C
had gone
D
have gone
Do you still remember the key points that ___________ in his report? I don’t remember them all.
#102323
A
referred to
B
were referred
C
he was referred to
D
were referred to
----I’m sorry, but making a telephone call is not allowed in the meeting-room. ----Oh, I_____that, Sorry, I don’t do that again.
#104824
A
don’t know
B
didn’t know
C
won’t know
D
haven’t known
Mary is a newcomer. I suppose it will take her a long time to _______ herself to the new surroundings.
#101040
A
adopt
B
devote
C
adapt
D
commit