—______to give back the books to the library before Friday.
—OK. I will.
| A．Remember | B．Remembered |
| C．Remembering | D．To remember |
As we all know, a dictionary is a book ______ gives the meaning of words.
| A．which | B．what | C．who | D．whom |
—Have you known Mr. Smith for a long time?
—Yes, since he ______ to our university.
| A．come | B．came | C．comes | D．has come |
I didn't manage to repair my car ______ you had told me how.
| A．until | B．when | C．unless | D．because |
More than 70,000,000 sharks ______ for their fins every year. It's really time for us to do something.
| A．kill | B．killed |
| C．are killed | D．were killed |