Experiments of this kind in both the U．S．and Europe well before the Second World War．
#102432
A
have conducted
B
have been conducted
C
had conducted
D
had been conducted
推荐题目
The teachers insisted that the student ______wrong and that he _______
#102333
A
was; punished
B
was; be punished
C
should be; was punished
D
is; should punish
I have to see the doctor because I a lot lately.
#102282
A
have been coughing
B
had coughed
C
coughed
D
cough
Up to now, thousands of red phone boxes, the old image of Britain, ______ due to mobile phones.
#99769
A
removed
B
have removed
C
were removed
D
have been removed
(2012·九江高二检测) The aim of the project is to encourage students to _______ new ideas on networks.
#99219
A
figure out
B
let out
C
try out
D
make out
He________his leg when he________in a football match against another school.
#99178
A
broke；played
B
has broken；was playing
C
broke；was playing
D
broke；had played