Some Christians ought to have it banned,______it to be the Devils drink.A．Having believedB

It’s time we ____some measures to solve this problem.A、must takeB、will takeC、tookD、have

He promised me a letter; he ought to ______ it days ago.A．have writtenB．writeC．had written

______ it is possible that genes have some influence, I find it hard to believe that they

You ______her at the beginning, but now it is too late. A. ought to have refusedB. ought

Today, it is not rare to hear that some universities have lowered their admission requirem

A fire engine must have priority as it usually has to deal with some kind of ______