The students were studying in____________classroom when, all of ____________sudden,the lights went out.
| A．不填;不填 | B．a;the | C．the;a | D．the；不填 |
相关试题
It’s helpful to put children in a situation ______ they can see themselves differently.
| A．that | B．when | C．which | D．where |
-How amazing it is that astronauts are exploring outer space!
-It’s a challenge, I guess, ______ man against nature.
| A．of | B．for | C．by | D．about |
-Why does the Lake smell terrible?
-Because large quantities of water.
| A． | have polluted | B． | is being polluted | C． | has been polluted | D． | have been polluted |
–Bruce, I really appreciate your handwriting. 
- _______. .
| A．I practice every day | B．Thank you very much |
C．No, I don’t think so | D．Well, it’s not good enough |
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