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
—Hey! Here is a message on my cell phone, telling me to send money to… —Delete it! It’s a trick. Many a person by such tricks.
#102665
A
has been cheated
B
have been treated
C
were cheated
D
was cheated
The man whose songs we are fond of ____ in our city next week．
#104221
A
singing
B
to sing
C
will sing
D
sang
Land animals are believed ______ from sea animals.
#103259
A
to have developed
B
to have been developed
C
having developed
D
having been developed
—Watch! —I ____ but ____ I ____ anything unusual.
#104209
A
watched; have watched
B
have watched; am not seeing
C
was watching; wasn’t seeing
D
am watching; don’t see
— I will come to attend your lecture at 10:00 tomorrow. — I’m sorry, by then my lecture will have ended and I＿＿my guests in my office.
#104424
A
is being met
B
will meet
C
will be meeting
D
will have met