The teacher didn t______to my questions.A．answerB．tellC．sayD．reply

The doctor didn’t _______ the truth to him.A.openB.exposeC.revealD.discover

There happened to be some students in the room, ______？A．didn"t theyB．didn"t thereC．doesn"

The students didn t manage to work out the problem ______ their teacher had explained how

I didn’t expect you to turn _____ at the meeting

The new staff didn’t know how to use the system _________ I explained it to him yester

I wrote this article to pay ________ to my respectable teacher who set me on the path of writing.