Some of the students are not sure ___ spelling the word, while others are not sure ___ the use of some grammatical rules.
#28757
A
of… about
B
about…to
C
of…to
D
for….of
推荐题目
. I used to be able to play well but I'm _____ now.
#28305
A
out of date
B
out of touch
C
out of practice
D
out of place
He has been caught      the rain and is wet       the skin.
#26537
A
by; to
B
in; to
C
in; through
D
with; in
_______, women have changed history in terms of the contributions they have made. 
#25461
A
To some extent
B
In conclusion
C
In addition
D
As a whole