Our classroom _______ by us every day!
| A．is cleaning | B．has cleaned | C．must clean | D．is cleaned |
_______ I know, he is kind.
| A．As soon as | B．As long as | C．As far as | D．As well as |
While she _______ , she cut herself.
| A．was cooking | B．cooked | C．had cooked | D．cooks |
The man ______ gave us a talk on science yesterday is a famous scientist.
| A．who | B．whose | C．won | D．Watched |
_______ our surprise, he got the first place in the game!
| A．To | B．For | C．As far as | D．As soon as |