------ Why does the lake smell terrible?
------ Because large quantities of water _________.
| A．have been polluted | B．has polluted |
| C．have polluted | D．has been polluted |
- You look exhausted!
- I __________ tennis with my friend all the morning.
| A．played | B．had played | C．have been playing | D．will play |
She __________ an old friend of hers yesterday while she was shopping at the department store.
| A．turned down | B．dealt with | C．took after | D．came across |
The last time we had great fun was __________ we were visiting the Water Park.
| A．where | B．how | C．when | D．why |
As a writer, he used to go deep into life to __________ materials for his creation.
| A．accumulate | B．accelerate | C．apologize | D．Absorb |
You should take advantage __________ this opportunity and try to make a good impression __________ them.
| A．of; of | B．over; on | C．over; of | D．of; on |