My name _____ Tom.
[ ]
A. am
B. is
C. are
D. be
答案：B
Mr Green _____ to the manager now. You’d better call him later.
A．is talking
B．talked
C．talk
D．talks
心肌的特征为（）
A.细胞具横纹，但非随意肌
B.细胞具横纹，但不分叉
C.非横纹肌，且非随意肌
D.属横纹肌，且是随意肌
