She always watches her son ________ the road every morning, or she will feel worried.
#48963
A
crossing
B
cross
C
to cross
D
to crossing
推荐题目
Why not think about ______ to  Greece? 
#51368
A
went
B
going
C
togo
D
goes
 ——would you like somewhere__________?——No, thanks. I have a big room ________.
#48887
A
live ,live
B
to live , to live
C
living, to live
D
to live , to live in
– Would you show me ____ an e-mail , please?-- Sure.
#49699
A
how to make
B
how to send
C
which to make
D
when to send
Do you prefer _______?
#49119
A
skate
B
skates
C
skating
D
skated