正常成年人身上骨的总数是（）
A．212块
B．206块
C．209块
D．207块
参考答案：B
解析：正常成年人身上共有206块骨头。
规定向东为正，那么向西走5千米记为_______千米．
When we got there, he was about to leave. So he only had time to explain _____ to us how he _____ our plan. [ ]
A. impatiently; like
B. repeatedly; thought about
C. carefully; thought of
D. roughly; found
