I really enjoyed your speech, ______ there were some parts I didn’t quite understand.

  A. because            B. for          C. until            D. though  

            the 632-meter Shanghai Tower is finished, it will be the second tallest building in the world.

   A. When            B. Since                C. Before               D. Unless

— When shall we leave for China?

— We won’t 　　　　 we have visited all the places of interest here.

　 A. until　　　　　　　 B. while　　　　　　　 C. as　　　　　　　 D. since

 We must get up at 7:00 tomorrow morning, _____we will be late for the meeting.

A. and                  B. or                 C. but

The man was so tired,_     _    he still went on working.

     A. so      B. but             C. or             D. and

 I didn’t believe he could drive            he told me.

   A. once            B. while            C. since            D. until

 Frank lives a simple life______ he  has lots of money.

A. although  B. because   C so   D. if

 Tcny is only four years old, _______he draws very well.

A- but B, so C. or D. and

—Why didn't you try your best to get on the subway?

—I tried to, but it started moving_________I could get on it.

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

We should care more about our health, _______ good health is the first step towards success.

A.　　 so B. because C. but D. if