—I need a red pen now, mom. —Oh, I'm busy now, let your father           one for you.
#55075
A
to buy
B
buying
C
buys
D
buy
推荐题目
Please give me a piece of paper______.
#55541
A
to write
B
to write on
C
writing
D
to write it
I ______ classical music ____ pop music . 
#56194
A
like, to
B
prefer, to
C
prefers, to
D
preferring, to