(A)when
(B) once
(C) which
(D) since
How long() you() a member of the club?A.have,,joinedB.have,,beenC.has,,joinedD.has,,been
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I think the hatch covers ________ all fixed up by youA.wasB.wereC.beD.been
The number of the newly admitted students ______over 300, but a number of them ______not arrived yet.A. is, hasB. are, haveC. is, haveD. are, has
Why()the old block of flats()demolished next month?A、are…beingB、is…beingC、has…beenD、have…been
At last we got the letter we had long () expecting.A. areB. wereC. beD. been
He () some difficulty () the book into Japanese.A、is, to translateB、has, to translateC、is, in translatingD、has, in translating
She ___here a minute ago.A.isB. wasC.beD. been