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]How much money could have been saved by the man
A. $68.
B. $35.
C. $49.
D. $53.
[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]—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]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]There could have been a war over it but peace ______ in the end.
A. counted
B. revealed
C. prevailed
D. survived
[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
[单项选择]If he ______ my advice, he could not have been so miserable.
A. listens to
B. had listened to
C. would have listened to
D. should listen to
[单项选择]If he ______ my advice, he could not have been miserable.
A. listen to
B. had listened to
C. would had listened to
D. should listen to
