Choosing to visit the Shanghai Expo on a late afternoon can make you see two to three times as many of the most popular pavilions between 6 pm and closing time ____ you hurry.

A. when             B. unless              C. where          D. if

At the Copenhagen conference, all the countries were called on to do all they could to control greenhouse gas emissions        it was too late. w ww.ks 5u.co m

       A．when B．a(chǎn)fter  C．until  D．before

---Mr. Parker is so ambitious. He is seeking any opportunity to get promoted.

   ---That’s understandable.       you are in our company determines how well you are paid and       you can do with your life.

       A．Who; that B．How; what       C．What; that D．Where; what

_______ or not, you’ve got to accept that your kids are grown up now.

A. Whether you like it                    B. If you like it

C. Whether you like them                         D. If you like them

Studying alone, you are free to choose what to learn and when, ________ you don’t need others’ agreement.

A. while                     B. if                           C. though                    D. as

The process of producing electricity may also give out CO2, _______ you heat your house with electricity instead of charcoal.

   A. even if                       B. as long as               C. as if             D. as soon as

It shocked us all        that little boy hadn’t been separated from that patient, he would have been infected with H1N1.    A．if that    B．that if  C．if        D．that

Lei Lei was only too ready to help others, seldom, _______, refusing them when they turned to him.

A. if never         B. if not            C. if any             D. if ever

I think it will be long ______ the influence of Sanlu Milk Powder incident dies down.

       A. that                  B. since                        C. before               D. after

—Shall we attend the concert this evening?   —Great idea, ___ we can do some shopping first.

A. when          B. where         C. since          D. if