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
