At this time tomorrow _____ over the Atlantic.

A. we’re going to fly          B. we’ll be flying        C. we’ll fly     D. we’re to fly

With the help of high technology, more and more new substances ______ in the past years.

   A. discovered        B. have discovered 

C. had been discovered  D. have been discovered

-----Did you watch the basketball match yesterday?

   -----Yes, I did. You know, my brother ________ in the match.

   A. is playing      B. was playing      C. has played      D. had played

— I wonder ________ you’ll water this kind of flower.

——Every other day.

A. how often     B. how long   C. how soon   D. how much

---- Sorry, I have to ______ now. It’s time for class.

---- OK, I’ll call back later.

A. hang up       B. break up    C. give up           D. hold up

You may use the room as you like ___ you clean it up afterwards.

A. so far as     B. so long as   C. in case   D. even if

23. —Did you get a ticket?

—No,I_________,but there wasn’t any left.

A.had to                            B.attempted to

C.decided to                         D.managed to

　　 Children’s brains can’t develop properly_______ they lack protein(蛋白质).

　　A. when  B. since  C. because  D. unless

　　 There are a lot _______ people today than yesterday.

　　A. of  B. more  C. most  D. /

 “____either you or he to go there?” “_____is.”

  A. Are; Both   B. Are; Neither  C. Is; Neither  D. Is; Each