A beam of light will not bend round corners unless______to do so with the help of a reflecting device .
A.having been made | B.being made | C.made | D.you make |
—Oh my god! You__ wear slippers to attend the conference.
—I'm sorry I forgot there is a conference.
A.must | B.can | C.should | D.shall |
In this experiment, the famous professor showed three different____ to the study of physics.
A.means | B.methods | C.ways | D.approaches |
_______the match is lost? We can fight again!
A.Even though | B.What though | C.If though | D.As though |
These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on.
A.would have been unthinkable | B.would not be unthinkable |
C.would be unthink![]() |
D.would not have been unthinkable |
I made a fire ____up the room as soon as my father came in.
A.warm | B.warmed | C.to warm | D.warming |