Hong Kong returned to the motherland ________ July 1st, 1997.
A. on B. in C. at
I knocked on the door but ________ answered.
| A．somebody | B．anybody | C．nobody | D．everybody |
— ________ did you put my glasses just now, Bill?
—On the desk.
| A．Where | B．Why | C．What | D．When |
Tom was ill yesterday, ________ he didn’t go to school. But he’s better now.
| A．or | B．but | C．for | D．so |
We usually read English ________ the morning.
| A．on | B．in | C．at | D．of |
Kate and Alice are good friends. ________ often help each other.
| A．They | B．Them | C．Their | D．Theirs |