Where were you just now? ________ Jack called you on the phone．

A．Some

B．Certain

C．One

D．Another

It’s definitely ________ that you constantly repeated the same mistake．You ought to explain it to me．

A．no doubt

B．no wonder

C．no coincidence

D．no hesitation

Is it ________ that he is going to get married next month?

A．real

B．true

C．genuine

D．factual

Don’t be nervous about ________ confidence at social event．Get prepared in advance．

A．a lack

B．lack in

C．lacking of

D．lack of

It is believed that Tom will make an outstanding racing driver because he has a talent ________ driving．

A．for

B．of

C．on

D．to

We had better leave things ________ they are until the police arrive．

A．if

B．when

C．since

D．as

Many players later failed drug test, ________ the race had to be rerun．

A．now that

B．so that

C．as soon as

D．in order that

Saleha came home so thin and weak that her own children barely ________ her．

A．realized

B．understood

C．recognized

D．knew

After taking ________ exercise, he caught a cold and soon had ________ temperature．

A．the; the

B．a; a

C．an；不填

D．不填; a

Studies show that students are more ________ to be addicted to playing computer games if they always play them before computer screens every day．

A．possible

B．probable

C．likely

D．perhaps