--Have you ever been here before? ---Well, I once _________ here for four years. Those days are really unforgettable.

--Have you ever been here before? ---Well, I once _________ here for four years. Those days are really unforgettable.

#103634

have stayed

had stayed

have been staying

stayed

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We'd better take umbrellas—I'm sure it____when we arrive in London; it's always wet there at this time of year．

#100548

will rain

is raining

will be raining

would rain

The water will be polluted unless some measures _____.

#103340

will be taken

are being taken

are taken

were taken

-- Daniel，why are you so late? We_______ you would be here an hour ago.--- Sorry. I _______ know you were all here.

#101249

expect；don’t

expected；don’t

expected；didn’t

expect；didn’t

-How long ______ each other before they ______ married?--For about a year.

#104894

have they known; get

have they known; were going to get

do they know; are going to get

had they known; got

－Why does the river smell terrible?－Because large quantities of water______．

#100039

have been polluted

is being polluted

has been polluted

have polluted

共5993题