______your father at work the day_____yesterday(前天)﹖
What do you do ____ the weekend? A. on B. in C. at
When is your birthday? It’s ______. A. June 9 B. June the 9 C. June 9th .
John is ______the phone. A. answering B. answer C. are answering
What _____ you doing? A. are B. am C. is
I eat dinner ________ 7:00 in the evening. A. on B. in C. at