It is dangerous to allow the children who are ________ swimming in the river.
A.enough old to go | B.not old enough to go |
C.not enough old to go | D.not old enough going |
The new library building _____ last week.
A.was completed | B.is completed | C.completed | D.has completed |
—Did you call Sara back?
—I didn’t need to, _____ we’ll have a meeting together tonight.
A.though | B.unless | C.because | D.if |
Keep practicing and you _____ your English.
A.improve | B.will improve | C.improved | D.were improving |
The air in mountain areas is ____ that in big cities.
A.as fresh as | B.fresher than | C.as dirty as | D.dirtier than |
Beijing is _____ capital of China and it is _____ city with many places of interest.
A.a; a | B.a; the | C.the; a | D.the; the |