Cable TV began in 1948 in the USA, but it took 50 years________ 66 percent of American households had it.

A. before                    B. after                      C unless                     D. since

---Tom hurt his left leg in the game this morning.

---Really? It would take at least two weeks ______ he could recover and return to school.

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

So although Fleming discovered penicillin, it was over a decade ___________someone else turned penicillin into the great drug of the 20^th century.

   A. when           B. that              C. before             D. unless

-----Do you have a minute? I’ve got something to tell you.

-----OK, _________youw ww.ks 5u.co m make it short. You see the match between Argentina and Korea is on and I won’t miss every wonderful moment.

A. so long as       B. now that          C. if only             D. every time

It is obvious to the students ______they should get well prepared for their future.

  A. which   B. that      C. as     D. whether

Dandy left word with my secretary _____ he would call again in the afternoon.

A. that    B. who     C. which    D. as

_____ is known to us all is that the 2010 World Expo will take place in Shanghai.

A. It            B. What         C. As           D. Which

______ impressed the audience most was ______ the magician Liu Qian played in this year's Spring Gala.

A. What; what         B. What; that     C. That; what      D. That; that

This requires you to be patient ______ you have to read the information to decide _______ it is related to ______ you are researching.

    A. because; if; that                                B. with what; whether; what    

    C. as; if; what                                     D. for; whether; that

— Who will you______ to write the article?

   — ______ fits for the job.

   A. have; Anyone who                         B. get; Whoever    

   C. suggest; The one who                       D. hope; Anyone