(单选题)42: It is a (worthwhile) experiment even it may fail. ( )
A: necessary
B: completely
C: valuable
D: perfect
(责任编辑:admin) |
(单选题)42: It is a (worthwhile) experiment even it may fail. ( )
A: necessary
B: completely
C: valuable
D: perfect
(责任编辑:admin) |