The computer system ____ suddenly while he was searching for information on the Internet.
| A．broke out | B．broke down | C．broke up | D．broke in |
When we are in a new place, we must __our manners and try to follow the customs of the place.
| A．look out | B．keep eyes out | C．mind | D．put up with |
In the early morning all of us stood at the top of the mountain __ east of the city, watching _____burning sun rising.
| A．/; a | B．the; a | C．the; the | D．/; the |
The boy was led ___while crossing the road.
| A．in the hand | B．by his hand | C．by hand | D．by the hand |
___ has taken away my notebook?
| A．Which of you | B．Who of you | C．Which you | D．Who you、 |
Columbus is known for the great discovery ____ a new land-America.
| A．making up | B．making into | C．make from | D．made of |