Sometimes I feel bored and don’t  know ______ to do.                          
#55615
A
how
B
why
C
what
D
where
推荐题目
—It’s very hot in the room! --_______ the door open?
#55563
A
Why don’t keep
B
Why don’t to keep
C
Why not keep
D
Why not you to keep
I will never forget that terrible accident _______ it happened so long  ago.
#58094
A
even though
B
so that
C
only when
D
ever since
Give me your telephone number ____I need your help.
#57994
A
whether
B
unless
C
so that
D
in case