The determined mother has devoted all she has to ________ her son out of trouble.
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.
When we visited Zhou Zhuang again ten years later, we found it changed so much that we could hardly ________ it.