It's ten years since the scientist _______on his life's work of discovering the valuable chemical.

A．made for         B．set out        C．took off           D．turned up

Anyone knew that claims about economic recovery _____ just around the corner were untrue.

A．being          B．to be             C．done            D．would be

I am sure he is up to the job       he should give his mind to it.

A．until        B．in case         C．if only         D．unless

--- The price is fine with me. How would you like       paid?

--- Well, it is up to you.

       A．one         B．this                                       C．that        D．it

Nearly all trees have seeds that fall to the ground,       _, and eventually produce new seeds.

A．take root          B．taking root         C．took root           D．to take root

— Mum, it’s none of my business. Why ______ I care?

— Just because she is your sister.

A．can          B．will           C．should           D．may

Many experts hold the view ______ teacher development is ______the key to better. education lies. 

                                                                     A．which; where         B．that ; where 

C．which; in which                                         D．that; in which

—Have you persuaded him?

—Yes. After some hours of discussion, I                to reason him in accepting the new plan.

C．have managed                                        D．managed

As we all know, it was         that resulted in the terrible car accident.

                                       A．because of her carelessness                  B．because she was careless   

C．her being careless                                D．she was so careless

The news came as no surprise to me. I       for some time that the factory was going to shut down due to the financial crisis.

A．knew        B．had known             C．have known           D．know