—Look! A book is on the floor. Whose is it?—It ______be Rick's. It has his name on it.
#76529
A
mustn't
B
can't
C
must
D
need
推荐题目
Keep up good state of mind even if you ________ fail plenty of times.
#62503
A
must
B
will
C
can
D
should
(2013·江苏南通市二模)We ________ have hurried all the way to the airport — the flight was called off because of the foggy weather.
#62421
A
mustn't
B
couldn't
C
needn't
D
wouldn't
At last the boy was made and began to laugh.
#77712
A
stop crying
B
to to stop to cry
C
to stop crying
D
stop to cry
－These peaches really juicy.－They ____ be! Just see the price, $3,99 a pound. Very expensive, aren’t they!
#62898
A
would
B
could
C
might
D
should
—When I first got to Harvard, my awkward English brought me great trouble.——Oh, dear, it _______a struggle for you to keep up with other students.
#63055
A
might be
B
can be
C
could have been
D
must have been