So far no life has been found outside the earth, but while some scientists are actively searching for living things in outer space, others firmly believe there ____ .
#88293
A
mustn’t be
B
may not be
C
can’t be
D
won’t be
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.—Would you like to work in my company?—Sorry, I’d rather ____ here, but I’d rather my brother _____ to your company.
#89507
A
staying, goes
B
to stay, to go
C
stay, went
D
to stay, goes
— Do you still remember when we went to Chongqing? —I can’t remember now but ______ sometime last summer?
#90411
A
could it be
B
might it be
C
could it have been
D
might it have been
Tom , you_______ leave all your clothes on the floor like this !
#90440
A
wouldn’t
B
mustn’t
C
needn’t
D
may not
Why didn't you tell me there was no meeting today? I______ all the way here through the heavy snow.
#89455
A
needn't have driven
B
can't have driven
C
mustn't have driven
D
shouldn't have driven