Harry telephoned to the airport to______ whether Flight 24 for San Francisco is departing on time.
#11902
A
prove
B
ensure
C
confirm
D
identify
推荐题目
—How did she get infected?  —She _______ the viruses without any protection.
#12814
A
exposed to
B
had exposed to
C
was exposed to
D
been exposed to
Some experts believe it is the grandparents who ________ for the spoiled child.
#12540
A
are to blame
B
are to be blamed
C
should blame
D
are blamed
There has been ____ accidents on this part of road. 
#14351
A
a number of
B
a great deal of
C
a series of
D
plenty of