用动词的适当形式填空

Mary is always practicing ________(speak)English when she is free．

用动词的适当形式填空

He suggested ________(go)out for a picnic．

用动词的适当形式填空

He has avoided ________(punish)by the class-master for his being late．

用正确的介词、副词填空

I think you should concentrate ________ getting good results in English．

用正确的介词、副词填空

Jason always has an excellent attitude ________ his students．

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He made it possible for scientists ________ use the Internet．

用正确的介词、副词填空

It has been two years ________ we smoked．

用正确的介词、副词填空

He is going to listen ________ a talk．

用正确的介词、副词填空

From now ________, we will make better use of the computer．

用正确的介词、副词填空

Berners-Lee came ________ with the idea of the World Wide Web in 1989．