I didn’t see Tom yesterday. Do you know ?A、what happened with him B、where he has beenC、why didn’t he come
—You look very worried. ________ ?—My mother suddenly got ill yesterday.
I found _____ necessary to save energy and protect the environment.
In our city, _____ middle school students want to work as a teacher in the future.
Don’t _____ today’s work for tomorrow. Today’s work must be done today.
—I have no idea what to wear for the singing contest?—Well, the dress_____ you bought yesterday may be the best choice.