The Oxford English Dictionary is necessary for learning English，so you'd better buy __________．

A．thisB．thatC．itD．one

The girl is sure to become a good actress __________ she gets the right training．

A．untilB．if

C．althoughD．unless

Paula waited until all the luggage was cleared，__________ hers never appeared．

A．orB．soC．asD．but

The money will be used __________ the school with new computer equipment．

A．to provideB．providing

C．providedD．to be provided

I have no doubt that he will make it，but I wonder __________ he is really ready enough．

A．whatB．why

C．whetherD．that

I thought it hard to complete the project at first，but I __________ my mind．

A．changeB．have changed

C．had changedD．would change

Careers Advice service is only available to people __________ on day-time courses．

A．to studyB．study

C．studiedD．studying

Parents often tell their children that they __________ take candy from strangers．

A．needn'tB．wouldn't

C．shouldn'tD．daren't

I've heard that preparations __________ for the coming festival．Let's give them a hand．

A．are being madeB．have been made

C．are makingD．have made

They have leading experts in this field，and that's __________ they've made important progress．

A．whereB．why

C．whetherD．who