Can you make sure ________ the gold ring?

A．where Alice had put

B．where had Alice put

C．where Alice has put

D．where has Alice put

Work hard, ________ you will fail in your examination．

A．and

B．unless

C．if

D．or

Tom couldn't enter his house, because he ________ his key in the office．

A．forgets

B．forgot

C．leave

D．left

－Do you mind if I open the window?

－________ I feel a bit cold．

A．Of course not．

B．I'd rather you didn't．

C．Go ahead．

D．Why not?

I always take something to read when I go to the doctor's ________ I have to wait．

A．in case

B．so that

C．in order

D．as if

In ________ Chinese culture, marriage decisions were often made by parents for their children．

A．traditional

B．historic

C．remote

D．initial

Jackie wouldn't feel happy ________ at home alone．

A．stay

B．to stay

C．staying

D．stayed

There was something wrong with my watch, I had it ________ this morning．

A．mend

B．to mend

C．mended

D．mending

Computer came into being ________．

A．in the 1950

B．in 1950s

C．in the 1950s

D．at the 1950s

Come on, don't give it up!You must try it ________．

A．two

B．a second

C．the second

D．double