单项选择题(20)()
A.master B.go over C.present D.get through
单项选择题(19)()
A.for B.in C.after D.before
单项选择题(18)()
A.Look at B.Take C.Make D.Consider
单项选择题(17)()
A.our B.your C.their D.other
单项选择题(16)()
A.but B.nor C.or D.for