Never be ashamed to ask about ________．

A．that you don’t understand

B．what you don’t understand

C．that don’t you understand

D．what don’t you understand

I wonder how many years ago ________．

A．did your father retire

B．your father retired

C．has your father retired

D．your father has retired

The people at the party were worried about Janet because no one was aware ________ she had gone．

A．where that

B．of where

C．of the place where

D．the place

George ________ he could improve his test scores, but he did not have enough time to study．

A．knew to

B．knew how

C．knew how that

D．knew how to

Jack asked me about myself and wanted to know ________．

A．what had I studied English for

B．where did I study

C．where had I studied

D．Where I had studied

The problem ________ overworking all day long impairs his health．

A．is

B．that

C．which

D．is that

The old man asked Henry ________ England next week．

A．whether will he go to

B．whether would he go to

C．whether he is going to

D．whether he would go to

Do you remember where ________ my watch?

A．had I put

B．had put I

C．I had put

D．put I

－________?

－I think he is Charles Yang．

A．Who do you think he is

B．Do you think who he is

C．Whom do you think he is

D．Who you think he is

________ is unknown to me．

A．Where he is

B．Where is he

C．He is where

D．Is he where