He always gives me useful advice when I don’t know        next .
#48456
A
how to do
B
when to do
C
what to do
D
where to do
推荐题目
You must be tired now. Why not ____ a rest?
#51081
A
to stop to have
B
to stop having
C
stop to have
D
stop having
Lucy likes English very much . She does her best _____it well.
#49337
A
to learn
B
learn
C
learning
D
is learning
They were made _______ the whole night. 
#50613
A
working
B
work
C
to work
D
worked