Several teachers and students are working together to find ______ they hope will be the easiest way to solve this problem. 
#78886
A
which
B
that
C
what
D
as
推荐题目
Someone is ringing the doorbell. Let’s see _______.
#79228
A
who is he
B
who he is
C
who is it
D
who it is
Mr.Green didn’t understand ________ made his daughter so absent-minded this morning.
#79261
A
how that was
B
what was it
C
why it was that
D
what it was that