Mom, I wonder ________.—Baby, I think you should study harder.

_______ you _________have a robot in your family in the future

Are you familiar(熟悉) with the music?— Yes. There was ______ time _____ this kind of music was quite popular. [ ]

My mom was mad at me last night. What shouldI do—Please say sorry to her________.

Tom as well as two of his classmates _____invited to the party.