I was on the highway when this car went past followed by a police car．They ________ at least 150 kilometers an hour．

A．should have been running

B．must have been running

C．could have run

D．would have run

Tom apologized for ________ to inform me of the change of the plan．

A．his being not able

B．him not to be able

C．his not being able

D．him to be not able

It was after he got what he had desired ________ he realized it was not so important．

A．that

B．when

C．since

D．as

My father ________ my brother for driving but he wanted to pick ________ the knowledge of computer during the spare time．

A．advised; up

B．persuaded; out

C．intended; up

D．managed; out

Can you ________ a few minutes for me?

A．spend

B．spare

C．share

D．offer

I never forget the days we ________ learning together．

A．spent on

B．spent in

C．cost in

D．took in

The dictionary is ________ to my translation, but that one is ________．

A．great help; helpless

B．a great help; of no use

C．importance; of few importance

D．very helpful; of no any use

You will find the map of great ________ in helping you to travel London．

A．price

B．cost

C．value

D．usefulness

In the seventeenth century an adding machine ________．

A．had been invented

B．was found out

C．was discovered

D．was invented

Who will ________ your children when you are away?

A．care about

B．care for

C．take care

D．look for