外伤性关节脱位常见于()
A．髋关节
B．肘关节
C．肩关节
D．腕关节
E．踝关节
参考答案：C
The film is very interesting. _______students have seen it.
A．A plenty of
B．Many of
C．A great many
D．Two hundreds
The school trip is _____ February 28th. [ ]
A. on
B. in
C. at
D. of
