I suppose that when I come back in two year’s time all these old houses will ____ down．

A.have pulled

B.be pulling

C.have been pulled

D.be pulled

答案及解析： C

考查时态，句意是：我想当我两年以后回来时，所有这些旧房子将会被推倒。用将来完成时，并用被动语态。选C。