She ______ a little Chinese.[ ]
A. talks
B. says
C. speaks
D. tells
答案：C
You must be _______when you ______he the road.[ ]
A.careful;cross
B.carefully;cross
C.careful;across
D.carefully;across
精液中乳酸脱氢酶同工酶活性最强的是()
A．LD
B．LD2
C．LD3
D．LD4
E．LD-X
