Sarah pretended to be cheerful,________nothing about the argument.(2011·全国Ⅱ)
Something will have to be done about the air pollution,_____?
Is this the museum _____we visited last year?
Though they are not very sure of the long-term ,all the scientists agree to start_____,all the scientists agree to start the research immediately.
--- I think you'd better type this letter again before Mr Smith sees it. --- Oh, dear! (2008 .江西)
---Honey, let's go out for dinner. ---_______I don't have to cook.(2010.重庆)