Let's __________ to school together. [ ]
A. go
B. going
C. goes
D. to go
答案:A
---What are these ? --- ______ are pens.
A.They’re
B.Those
C.They
D.It
齿线以上直肠淋巴液首先回流到()
A.髂内淋巴结
B.腹股沟淋巴结
C.腹主动脉周围淋巴结
D.坐骨直肠窝淋巴结
E.以上均不正确