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科目： 來源：不詳 題型：單選題

The town’s drinking-water _____ with prim chemicals at present.
A．contaminatesB．is contaminated
C．is being contaminatedD．has been contaminated

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科目： 來源：不詳 題型：單選題

“What place is it?” “Haven’t you found out we _____ back where we ______?”
A．were, had beenB．have been, are
C．a(chǎn)re, wereD．a(chǎn)re, had been

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科目： 來源：不詳 題型：單選題

I don't really work here; I ____ until the new secretary arrives.
A．just help outB．have just helped out
C．a(chǎn)m just helping outD．will just help out

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科目： 來源：不詳 題型：單選題

Scientists think that the continents ____ always where they ___today.
A．a(chǎn)ren't; areB．a(chǎn)ren't; wereC．weren't; areD．weren't; were

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科目： 來源：不詳 題型：單選題

The Titanic, the biggest ship of its day, ____ unsinkable, but it sank on its first voyage in 1912.
A．thoughtB．was thoughtC．thought itD．was thought it

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科目： 來源：不詳 題型：單選題

—I say, Harry. What did you say to the laid-off worker just now?
—Nothing. I ____ to myself.
A．had only talkedB．a(chǎn)m only talking
C．have just talkedD．was just talking

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科目： 來源：不詳 題型：單選題

The novels written by the author sell best, but five years ago no one could have imagined how great a role he _____in the literary world.
A．was playingB．was to playC．had playedD．played

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科目： 來源：不詳 題型：單選題

—I wonder if your wife will go to the ball. 
—If your wife does, so _____ mine. 
A．isB．doC．doesD．will

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科目： 來源：不詳 題型：單選題

—When will the train start？
—It _____ at 2:35 in the afternoon according to the timetable. 
A．startsB．will startC．would startD．started

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科目： 來源：不詳 題型：單選題

Has everything _____ can be done ______?
A．what; done　　　B．that; been done
C．that; already doneD．what; already being done

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