______ has not been found out when the plane took off.
A: It
B: That
C: What
D: Which
A: It
B: That
C: What
D: Which
举一反三
- We finally found out to him. A: what had happened B: what has happened C: which took place D: what has been taken place
- When we arrived at the airport, the plane ______ . A: already took off B: took off already C: had already taken off D: has already taken off
- By the time I got to the airport, the plane( ) . A: took off B: has taken off C: had taken off D: had been taking off
- It’s too late when we arrived at the airport as the plane ________. A: was taking off B: took off C: had taken off D: has taken off
- When I got to the airport, the plane ______. A: already took off B: had already taken off C: C. has already taken off