Don’t treat the vase as if it _______ made of steel.

. —How can I thank you? —Don’t mention it. Any other man in that case _______ the same thing. 

(2009安徽安庆模拟) He _____ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside.

As is natural, a man as old as he ______ be very forgetful.

— Could I borrow your dictionary ? — Yes , of course you ____ .