Robert is good at languages , _______ we all know .
| A．because | B．for | C．as | D．since |
What shall we use for power when all the oil in the world has___?
| A．given out |
| B．put out |
| C．held up |
| D．used up |
A person___e-mail account is full won’t be able to send or receive any e-mails
| A．who |
| B．whom |
| C．whose |
| D．whoever |
Samuel can’t help having a big nose---it is___of him to be curious about other’s affairs
| A．typical |
| B．constant |
| C．considerate |
| D．unique |
These product are very cheap because the industry___the raw materials,the prices of which remain low
| A．takes on |
| B．depends on |
| C．stands on |
| D．keeps on |
—How long are you staying?
—I don’t know.___
| A．That’s OK |
| B．Never mind |
| C．It depends |
| D．It doesn’t matter |