II.单项选择(共20小题，每题1分，满分20分）
16. —The 3D cinema provides a brand new experience of ________ space.
—Yes. You can even take ________ journey to the end of the solar system.
A. a; a B. /; a C. the; the D. /; the
17.How many nationalities ______ our country ______?
A. is; consisted of B. does; make up C. is; made of D. does; consist of
18.—What clothes should we wear to attend the ball?
—Dress ________ you like.
A. whatever B. no matter what C. however D. no matter which
19._____ to sunlight for too much time will do harm to one’s skin.
A. Exposed B. Being exposed C. Having exposed D. Exposing
20.Don’t just sit there ________ your legs; come and help me carry the box upstairs.
A. swung B. to swing C. swinging D. and swinging
