It was in the lab______ was taken charge of by Professor Zhang ____ they did the experiment.
The teacher ___ the students not to ___ quickly when answering questions.
Flight 19 from New York to Washington is now arriving at ____.
If no one ___ the phone at home, ring me at work.
It was difficult to guess what her _____ to the news would be.
_____ the English examination I would have gone to the concert last Sunday.