更多"These compounds could not have been"的相关试题:
[单项选择]These compounds could not have been formed if the chemical reaction ______ stopped.
A. have been
B. has been
C. had been
D. were
[单项选择]The grain could have been gathered in last week if the weather had been fine; but, ( ), it had to be left in the fields.
A. as it is
B. as it were
C. as it was
D. as it had been
[单项选择]How much money could have been saved by the man
A. $68.
B. $35.
C. $49.
D. $53.
[单项选择]The fight could have been avoided if both of you had been able to ( ) your anger.
A. hold back
B. hold on
C. hold out
D. hold up
[单项选择]—Such a stupid mistake could have been avoided.
—Unfortunately, he( )the mistake again and again.
A. repeated
B. would repeat
C. had repeated
D. would have repeated
[单项选择]There could have been a war over it but in the end reason ______.
A. prevailed
B. counted
C. induced
D. survived
[单项选择]—Such a stupid mistake could have been avoided.
—Unfortunately, he()the mistake again and again.
A. repeated
B. would repeat
C. had repeated
D. would have repeated
[单项选择]A couple of minutes earlier, () we could have been able to hear his speech.
A. and
B. on
C. but
D. so
[单项选择]A couple of minutes earlier,()we could have been able to hear his speech.
A. and
B. on
C. but
D. so
[单项选择]The tragedy could have been ______ if the crew had followed safety procedures.
A. interfered
B. averted
C. intervened
D. distracted
[单项选择]The student could not have been dead if ______.
A. he had got enough training on the real tracks
B. he had not worked the night shift
C. he had been careful
D. he had been working with someone else