The little boy is dirty from head to foot because he ________ in the mud all morning.
| A．has played | B．is playing |
| C．has been playing | D．was playing |
Mother always complains that children ________ their shoes very quickly.
| A．find out | B．wash out |
| C．wear out | D．set out |
Recently the Chinese society has ________ a flow of new words such as “Geili” and “Shanhun”．
| A．seen | B．observed | C．made | D．looked |
The two countries agreed to ________ their differences and work together for peace, which has a positive effect on the international situation.
| A．set down | B．set out |
| C．set aside | D．set about |
Camels have three eyelids to ________ themselves from the blowing sand.
| A．protect | B．stop | C．keep | D．hide |
According to the law, all foreigners have to ________ with the local police within two weeks of arrival.
| A．associate | B．dispute | C．negotiate | D．register |