There are so many kinds of pens in the shop ,I can’t decide ______.
#50047
A
when to buy
B
where to buy
C
what to buy
D
which to buy
推荐题目
Could you please ______ loudly in the library?
#49465
A
don’t talk
B
don’t say
C
not to talk
D
not talk
Mother told her son ______play too much.
#49810
A
to not
B
not to
C
don’t to
D
to do
Everything seemed _______ so fast and now it’s all over. 
#50615
A
happen
B
happened
C
to happen
D
happening