I didn’t know  ________.
#38751
A
when did the plane take off
B
when the plane took off
C
when the plane takes off
D
when does the plane take off
推荐题目
---Can you see ______ ? ---No. Let’s go and have a look. Maybe we can help them. 
#38729
A
what are they doing there
B
why are they talking there
C
what is happening there
D
what are they talking about
This is the hotel _______last month. 
#37126
A
which they stayed
B
at that they stayed
C
where they stayed at
D
where they stayed
- Can I join you?- Sure, we are talking about _____.
#39180
A
when shal we go to the movie
B
how can we go there
C
who should we go with
D
why we like the movie