Nobody knows for sure how dinosaurs died out 65,000,000 years ago. It _______ because of sudden changes of their living conditions.
#62591
A
must have happened
B
would have happened
C
should have happened
D
might have happened
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— Congratulations! You’ve got the first prize in the English Contest.—_____ it be true? It’s unbelievable!
#77443
A
May
B
Should
C
Must
D
Can
Finally, the team reached the top of the mountain, they found some rare plants.
#62628
A
why
B
which
C
where
D
as
We________finish it ahead of time, though it was such a tough task.
#62441
A
could
B
would
C
were able to
D
ought to
The winner of the race is tall and thin; he _______ be my friend, Mike, who is short and fat.
#63175
A
might
B
mustn’t
C
can’t
D
should
—We are worried about Tom. Why hasn’t he come back?—Don’t worry. He ______ in a traffic jam.
#62725
A
might be caught
B
may have been caught
C
can have been caught
D
should have been caught