（）my wife's consistent encouragement I wouldn't have accomplished my graduate study.

单项选择题They speak of election campaign polls as a musician might of an orchestra （）, or a painter of defective paint.

A．in pace
B．out of focus
C．in step
D．out of tune

单项选择题Bad traveling conditions had seriously （）their progress to their destination in that region.

A．tugged
B．demolished
C．hampered
D．destroyed