The ________ family in Chinese cities now spends more money on housing than before．

A．normal

B．average

C．usual

D．general

There ________ a trend that 3D films will become more popular ever since the film Avatar hit the market．

A．has arisen

B．arose

C．is arising

D．will arise

Mary rang the bell．________ she had not seen before．

A．Came in a boy

B．A boy did come in

C．In did come a boy

D．In came a boy

More and more children go to training schools, ________ they can gain extra knowledge．

A．when

B．which

C．why

D．where

He tried his best to solve the problem, ________ difficult it was．

A．although

B．no matter

C．whatever

D．however

________ a reply, the anxious mother decided to send an e －mail to her daughter abroad again．

A．Not receiving

B．Receiving not

C．Not having received

D．No having received

________ our team seems to lack at the moment is the determination to win the match．

A．That

B．What

C．Whether

D．If

One day I ________ a newspaper article about the motto of the London Olympics-Inspire a generation．

A．came up

B．came across

C．looked at

D．looked into

No driving after drinking is a rule that every driver ________ obey in our country．

A．will

B．shall

C．may

D．can

Every boy and every girl ________ asked to obey rules and regulations when they go to school．

A．are

B．were

C．was

D．is