If it _______ next week , the crops would be saved.
It is the first time that I _______ this kind of moon cake.
He realized she was crying ________ what he had said.
-He asked Tom, “Have you finished your homework?” -He asked Tom ______ .
The reason _____ he was late for the meeting was ____ his little son fell ill this morning.
At the meeting an important problem _______ and it attracted everyone’s attention.