By the time he was ten,Edison______experiments in chemistry.
| A．had already done | B．already had done |
| C．was already doing | D．already did |
－Have you heard of Miss Bi’s lung cancer?
－Yes,news came asshock to me.
| A．the; a | B．the; the | C．a; a | D．a; the |
－Excuse me, madam. My flight is BA 6520. Is this my gate?
－. Please show your ticket and ID card.
| A．That’s right | B．All right | C．That’ all right | D．It’s all right. |
I do hope that you can give me some good _______ on how to improve my spoken English.
| A．bases | B．tips | C．fares | D．opinions |
I love animals and that’s the reason ______ I hate the people who kill wild animals for money.
| A．that | B．in which | C．which | D．why |
In the library, I found a useful book ______ how to use English grammar.
| A．to explain | B．explained | C．having explained | D．explaining |