Food and fruit are forbidden in the library, ______ you are allowed to have drinks and sweets with you．
| A．and | B．but | C．so | D．or |
— Shall I help you get a dictionary since I’ll drop in at the bookstore this afternoon?
— .
| A．It couldn’t be better | B．Of course you can |
| C．If you like | D．It’s up to you |
For the sake of your health, I’d rather you ___ a flat in the mountain than ___ in downtown area as the transport is getting more convenient.
| A．bought, one | B．to buy, that | C．bought, the one | D．to buy, what |
Is it normal that in September hotels near universities are overcrowded, _____ many parents from a distance nowhere to stay 
but to sleep on the playground ?
| A．to leave | B．left | C．leaving | D．leave |
Among the competitors, there are three little girls , is Mary.
| A．the smallest of whom | B．the smaller of whom |
| C．the smallest of them | D．the smallest one |
The idea they have come up with sounds great, but it remainswhether it works well in practice．
| A．to see | B．to be seen | C．seeing | D．seen |