Glasses are ________ and must be handled with great care．

A．abundant

B．diverse

C．extinct

D．fragile

The school rule states that no child shall be, unless ________ by an adult, allowed out of the school during the day．

A．to be accompanied

B．accompanying

C．accompanied

D．being accompanied

Stephen Hawking believes that the earth is unlikely to be the only planet ________ life has developed gradually．

A．whose

B．where

C．which

D．what

What a pity! When we got to the cinema, the movie Let the Bullets Fly ________, so we saw only the end of it．

A．was finishing

B．has just finished

C．just finished

D．had just finished

No matter how low you consider yourself, there is always someone looking up to you ________

they were that high．

A．to wish

B．to have wished

C．wishing

D．having wished

________ a child begins school, he enters a world of fierce competition where success and failure are clearly defined and measured．

A．Before

B．Until

C．Whenever

D．The moment

Whatever they end up doing, they ________ themselves a great deal．

A．will be teaching

B．will have taught

C．are teaching

D．will be taught

The manager needs an assistant with ________ knowledge of French and ________ work experience．

A．the; a

B．不填; the

C．a; 不填

D．the; 不填

E-mail, as well as cellphones, ________ an important part in daily communication．

A．have played

B．play

C．are playing

D．is playing

This kind of stories ________ instructive while stories of that kind ________ harmful to children．

A．is; seems

B．are; seem

C．is; seem

D．are; seems