Nobody knows how people first came to these islands. They _____ from South America on rafts.
#87576
A
ust have sailed
B
an sail
C
ight have sailed
D
hould have sailed
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She________the opportunity，but unfortunately she just let it go.
#86619
A
should have taken
B
must have taken
C
needn't have taken
D
can't have taken
Mr. White _______ at 8:30 for the meeting, but he didn’t show up.
#89256
A
should have arrived
B
should arrive
C
should have had arrived
D
should be arriving
---- Did you visit the Big Ben in London?---- No, we ______ it, but we spent too much time shopping.
#90301
A
could visit
B
could have visited
C
must ahave visited it
D
can have visited
__ It is so late. Our son __________ be back . __ Don’t worry . I dare say he ________ have some extra work to do.
#88334
A
can ; must
B
will ; might
C
should ; must
D
must ; may
John promised his doctor he ________ not smoke, and he has smoked ever since.
#89109
A
might
B
should
C
could
D
Would.