While having an English class, ________________.
A: a firecracker went off
B: a firecracker goes off
C: we heard a firecracker go off
D: we heard a firecracker goes off
A: a firecracker went off
B: a firecracker goes off
C: we heard a firecracker go off
D: we heard a firecracker goes off
举一反三
- He heard the alarm _________.( ) A: go over B: go on C: go in D: go off
- If the electricity goes off, we have candles ______ in the closet. A: in stock B: in reserve C: in store D: on hand
- It’s<br/>a long trip and we’ll have to _______ early tomorrow morning. A: start off B: go off C: take off D: put off
- firecracker A: 价值 B: 社会 C: 杰作 D: 鞭炮
- No sooner ______ from the airport than we were starting to land. A: we had taken off B: we took off C: have we taken off D: had we taken off