It is quite warm here. You'd better ____ your coat
A. take off
B. put down
C. put on
D. take down
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Hurry up, ____ we'll be late for school.
A. but
B. or
C. and
D. so
Don't play with the knife. You ____ hurt yourself
A. may
B. should
C. have to
D. need
I haven't milked the cow ____.
A. yet
B. already
C. never
D. just
Beijing is ____ beautiful city. It's ____ capital of China
A. a; a
B. the; the
C. /; the
D. a; the