Experiments of this kind ___in both the U．S and Europe well before the Second World War．
#100251
A
had conducted
B
have conducted
C
have been conducted
D
had been conducted
推荐题目
—What were you doing when the telephone rang?—I ______ away my books and ______ to bed.
#101637
A
had just put;was going
B
was just putting;went
C
just put;had gone
D
have just put;gone
Until we have discussed all the details, no decision_________ about any new operations.
#100444
A
will be made
B
is made
C
is being made
D
has been made
--- Now where was I ?--- You ______ me about your travels in Canada.
#101004
A
told
B
were telling
C
have told
D
will tell
I lunch when I learned that former British prime minister Margaret Thatcher had passed away.
#100654
A
ate
B
had eaten
C
was eating
D
were eating
--Bob, How is your project? I heard you started it last Friday, right? ---Oh, I ____for it. But I haven’t decided when to do it.
#102420
A
have been preparing
B
had prepared
C
have prepared
D
was preparing