Experiments of this kind ___in both the U．S and Europe well before the Second World War
#100340
A
had conducted
B
have conducted
C
have been conducted
D
had been conducted
推荐题目
—Take this medicine three times a day，Tom!—Do I have to take it？It ________ so terrible.
#99741
A
is tasting
B
is tasted
C
tastes
D
has tasted
Communication along with information industry __ an important part in modern times.
#103041
A
play
B
plays
C
have played
D
are playing
Had it been possible, I would have gone to attend Monica in the hospital, but I fully occupied last month.
#101333
A
was
B
am
C
had been
D
have been
Large quantities of information, as well as some timely help _____ since the organization was built .
#102879
A
has offered
B
had been offered
C
have been offered
D
is offered
Nowadays it is obvious that the Internet _______ our life rapidly.
#101864
A
would change
B
changed
C
had changed
D
is changing