Sally has been swimming ______ four hours.
#50710
A
for about
B
since
C
about
D
/
推荐题目
--Jay Chou plays the role ___ Kato ___the 3D movie ‘ The Green Horney’. --- I have seen it.
#49039
A
of, of
B
of, in
C
in, in
D
in, of
China began to open to the outside world in the late 1970s. _________, there have been great changes in the country.
#46264
A
By then
B
As a result
C
At last
D
In all