20、We are looking forward to the holidays when we'll be traveling          camels_____the Sahara Desert.

A．by; across       B．by; through         C．on; through            D．on; over

19、Our game of badminton was interrupted. We        for about half when my partner was sent for by my boss.

A．played       B．has played        C．were playing             D．had been playing

18、It is said that people are          likely to tell lies over the phone as they are in emails.

A．as twice               B．twice as           C．twice more          D．twice than

17、--If we take a plane, we'll of course have arrived in Paris by the next weekend.

--Don't be sure, we should          the weather factor. What shall we do if it's foggy?

A．leave alone                                      B．take account of 

C．leave behind                                     D．take advantage of

16、Despite the fact that I've been told about the local people's attitude to strangers, under no circumstances          any rudeness.

A．I had met          B．I met        C．had I met           D．did I meet

15、The moment         Leo will never forget is          Mr. Green gave him a lot of valuable advice on how to improve his writing.

A．that; when          B．that; that        C．when; that           D．when; where

14、---Our holiday cost a lot of money.

--It doesn't matter         you enjoyed yourselves.

A．unless        B．as long as         C．as soon as        D．until

13、The word "media" basically refers to          we commonly call newspapers, magazines, radios and televisions.

A．which         B．that          C．where        D．what

12、It's a little surprising that a house made of wood or bamboo may stay up in an earthquake,

while     made of steel and concrete may fall down.

A．it         B．what           C．what         D．one

11、--I am afraid I can not tell you anything about the plan.

--But it is important that you         .

A．helped         B．will help         C．should help          D．shall help