Look! There are so many mistakes in your composition. You ________ have fixed full attention on it.
#86533
A
can
B
should
C
need
D
might
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Bob said he was going to join our club but he didn’t. What a shame! He ______ his mind.
#87666
A
can’t have changed
B
mustn’t have changed
C
wouldn’t have changed
D
shouldn’t have changed
 You could have seen Fang Zuming________ yesterday morning.
#86670
A
did you come
B
if you came
C
had you come
D
if you should come