﹣Could you please tell me where you found Miss Li just now？
﹣Of course， in the headmaster's office． They happily at that time．（ ）
| A． |
talked |
B． |
were talking |
| C． |
have talked |
D． |
talk |
There is someone knocking at the door．
It must be the repairman． I ______ him to come to fix our fridge two hours ago．（ ）
| A． |
call |
| B． |
have called |
| C． |
called |
______ exciting the news is! Beijing will hold 2022Winter Olympic Games．（ ）
| A． |
How |
B． |
What a |
C． |
What |
Julia， your mobile phone is ringing．
Wait a minute． It's dangerous ______ it while crossing the street．（ ）
| A． |
answering |
B． |
answer |
C． |
to answer |
Look， what an old bridge! It looks so special!
Yeah， it ______ nearly 500 years ago．（ ）
| A． |
was building |
| B． |
was built |
| C． |
has built |
Why ______ we close that chemical factory？
Because it has caused lots of pollution． We need better environment．（ ）
| A． |
must |
B． |
can |
C． |
may |