What the doctors really doubt is　　　 my mother will recover from the serious disease soon.

A.when　　　　 　　B.if　 　　　　　　　 C.whether　 　　　　D.what

—Was it two months ago ________ you luckily got an opportunity to spend your holiday in Canada.

—________. John was the lucky dog.

A. when, Not I B. when, Not really C. that, Not at all　 D. that, Not me

I was out of town at the time, so I don’t know exactly how it _______.

A. was happening　　 　B. happened　　　 　 C. happens　　　　 　 D. has happened

---What were you up to when she dropped in?
---I       for a while and      some reading
A. was playing; was going to do      B. played; did  
C. had played; was going to do       D. had played; did

It is clear that when the two substances are mixed, a certain kind of energy will be ___.

　 A. released　 B. removed　　　 C. replaced　　　　 D. reflected

— Do you have any idea what Paul does all day?

— As I know, he spends at least as much time playing as he ______.

A．writes B．is writing C．does writing　 D．does write

If you win the competition, you will be given ____ to Europe for two.

A、a free 7-day trip B、a free trip for 7-day C、a 7-day free trip D、a trip for 7-day free

If I were in ________ position of the mayor, I wouldn't allow ________ factory like this standing in the center of the town.

A．a; the　　　　　　　 B．the ；/

C．the ; a　 D．/ ; the