.
I remember putting the tape recorder in the corner, but what _______ it?
| A．has happened on | B．has become of | C．has happened | D．has taken |
You buy a gift, but you can if you want to.
| A．must | B．mustn't | C．have to | D．don't have to |
Father goes to the gym with us although he dislikes going there.
| A．hardly | B．seldom | C．sometimes | D．never |
Listen! Do you hear someone for help?
| A．calling | B．call | C．to call | D．called |
It was in the dining hall _______ was located behind the teaching building _______ I met her for the first time.
| A．where; that | B．that; where | C．which; that | D．that; which |
_______ to find the book from the library, she decided to turn to her professor for help.
| A．Failed | B．To fail | C．Having failed | D．Being failed |