Gun control is a subject ______Americans have argued for a long time.
A. of which B. with which C. about which D. into which
The astronauts found that ______ the spaceship went further and further into space, it became more and more difficult to control its own movements.
A. if B. till C. as D. while
You shouldn’t talk until ________ to.
A. asking B. having asked C. to ask D. asked
When I woke up, I found myself ______ in bed and ______ by doctors and nurses.
A. lying; surrounding B. laying; surrounded
C. lain; surrounding D. lying; surrounded
----- I’ ll give you a ring about eight.
------ Could you phone a bit later? I ______ dinner then.
A. will be having B. have had C. had D. was having
It’s well-known that ________ World Exposition in 2010 is quite ________success
A．不填; a B．the; a C．The; 不填 D．不填; the
