They have been skating __________.
A.for three hours | B.since three hours ago |
C.three hours ago | D.since three hours |
The number of the cranes is getting ___________.If we don’t help them, they will disappear ___________ a few years.
A.fewer and fewer; in | B.larger and larger; after |
C.more and more; after | D.smaller and smaller; in |
We were swimming in the lake _______ suddenly the storm started.
A.until | B.while | C.when | D.before |
The price of petrol(汽油) is not _______ that of last year, so some more people are planning to buy cars.
A.as expensive as | B.so cheap as |
C.as low as | D.so high as |
Everybody should study hard. No one can _______ us _______ a good future.
A.provide; for | B.provide; with |
C.keep; / | D.protect; to have |
There’s water all over the kitchen. You’d better _______ right away.
A.to mop up it | B.to mop it up |
C.mop it up | D.mop up it |