__________ you offered him!
| A．How useful advice | B．What a useful advice |
| C．How a useful advice | D．What useful advice |
She’s not strong enough________walking up mountains．
| A．to go |
| B．going |
| C．go |
| D．went |
—Could I borrow your camera？
—________，but please give it back by Saturday．
| A．I am sorry |
| B．Of course |
| C．Certainly not |
| D．No，thanks |
—Sir，could you please put out your cigarette？This is a smoke-free(无烟的)school．
—________．
| A．I’m sorry about this． |
| B．Not at all． |
| C．Sure．I’d love to． |
| D．Never mind． |
Few people think about what they can do________others．
| A．to help |
| B．helping |
| C．to helping |
| D．help |
—What are they doing now？
—They are busy________articles in the room．
| A．to write |
| B．write |
| C．writing |
| D．to writing |