John Wood，an Internet blogger，discovered that Samsung ________ for not protecting its workers from a dangerous chemical used on its phones.

A．had criticized　B．had been criticized

C．was criticized　D．was criticizing

Students ________ remain in their seats until all the papers have been collected.

A．shall　B．might

C．could　D．will

There is still a strong argument ________ mobile phones are a particular risk to children.

A．when 　B．which 　

C．that　D．what

Tom sacrificed his personal life ________ he could get ahead in his career.

A．in case　B．as if

C．so that　D．only if

This vase ________ perfect but for a few small holes in its base.

A．would have been　B．should have been

C．shall be　D．would be

________ the words，the daughter understood what her mother was trying to tell her.

A．To be heard　B．To hear

C．Heard　D．Hearing

We invited her to dinner but she didn't bother to ________.

A．turn on　B．turn away

C．turn up　D．turn out

There is an ongoing debate about the potentially harmful effects ________ text messaging can have on people's grammar.

A．what 　B．who 　

C．that　D．whose

The government has made laws to protect animals，so the number of the endangered animals ________ in recent years.

A．had grown　B．grew

C．has grown　D．is growing

It was Tom ________ is a soldier ________ saved the little girl from the water yesterday.

A．that；that　B．whose；whom

C．who；who　D．that；who