We should take part in such activities in future _____ we did yesterday.
A.which | B.as | C.that | D.than |
If we ________ now to protect our mother river ---Li Jiang River , we ‘ll live to regret it.
A.haven’t acted | B.won’t act |
C.don’t act | D.hadn’t acted |
Only after Mary read her article a second time _____the spelling mistakes.
A.did she notice | B.she noticed |
C.does she notice | D.she has noticed |
--- Tom , why didn’t you answer my call yesterday afternoon?
--- Sorry , I didn't hear the phone . I ___________ asleep.
A.must be | B.must have been |
C.could be | D.should have been |
If you want to change for a red one you'll have to pay ___________ $ 20.
A.another | B.other | C.more | D.each |
September 18, 1937 is a day _______ all Chinese will remember forever.
A.when | B.what | C.不填 | D.why |