School children must be taught how to deal with dangerous .
| A．states | B．conditions | C．situations | D．positions |
Sunglasses are sometimes worn to the eyes strong sunlight.
| A．prevent; from | B．care; of | C．defend; against | D．protect; from |
On April 24, Tsinghua University its 100th anniversary at the Great Hall of the People in Beijing.
| A．congratulated | B．challenged | C．celebrated | D．participated |
After sailing for five months, they arrived at they thought was the place they had been looking for.
| A．what | B．that | C．which | D．where |
--- What kind of house do you want to have? Something big?
--- Well, it be big --- that’s not important.
| A．mustn’t | B．needn’t | C．can’t | D．won’t |
wedding of Prince William and Kate Middleton has attention of millions of people in the world.
| A．A; / | B．The; / | C．A; the | D．The; the |