Sally has been swimming ______ four hours.
#50710
A
for about
B
since
C
about
D
/
推荐题目
–What do you call this in English?–It’s stamp. It is used ____ sending letters.
#50174
A
for
B
to
C
with
D
by
She has many nice dresses. She wears a different one every day ______ the week.
#47920
A
of
B
from
C
at
D
for
---How soon will Harry be back ？ -----He said he would come back _____ two days.
#49153
A
of
B
in
C
about
D
for