But for friction (摩擦力), people ______ neither walk, nor even stand up.
#86752
A
can
B
were able to
C
will be able to
D
could
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What a pity! Considering his ability and experience, he ______ better.
#87050
A
need have done
B
must have done
C
can have done
D
might have done
I told Sally how to get here, but perhaps I ____ for her.
#89352
A
had to write it out
B
must have written it out
C
should have written it out
D
ought to write it out
—It’s hard to believe that Jack should have fought with the policeman.—Yes. If one ____ ask for trouble, it can’t be helped.
#87262
A
may
B
need
C
must
D
should
—Do you know where David is? I can’t find him anywhere.—Well . He have gone far— his coat’s still here.
#87464
A
shouldn’t
B
mustn’t
C
can’t
D
wouldn’t
____ the aid from the government, the flood-stricken area ____ greater loss.
#87027
A
Apart from; should have suffered
B
But for; would have suffered
C
Without; could suffer
D
Except for; would have suffered