My best friend is good at ________.
#51400
A
sing
B
sings
C
singing
D
sang
推荐题目
 The children enjoyed_______ very much last night.
#49029
A
they
B
them
C
themselves
D
theirs
—Before he went abroad, he spent as much time as he ____ English. 
#50421
A
could learning
B
learned
C
to learn
D
could learn