–Do you have some trouble ____ the problem? Do you need some help?--No, thank you. I can make it myself.
#50320
A
solve
B
solving
C
to solve
D
solved
推荐题目
We must do everything we can waste water from running into rivers.
#48694
A
keep
B
kept
C
to keep
D
keeping
He used to in the morning, but now he is used to at night.
#50282
A
reading; read
B
read; read
C
reading; reading
D
read; reading
Jim asked Ling Feng his pet dog while he was away.
#50071
A
not to forget to look after
B
not to forget looking after
C
don’t forget to look after
D
don’t forget looking after
