—It’s _________ useful dictionary and you can’t throw it away .   —Thank you . I didn’t know it before .                 
#40868
A
a
B
an 
C
the
D
不填
推荐题目
—Have you _____ had dumplings? —No, not _____. 
#41474
A
ever; yet
B
ever; ever
C
yet; yet
D
yet; ever
She ______________ travel by car because she was afraid of flying.
#43053
A
used to
B
is used to
C
was used to
D
were used to
 People have learned a lot fromstudies.
#35692
A
science
B
scientific
C
scientist
D
sightseeing