单项选择题

Mountain biking demands hill--walking strength as well as track-riding skills. Initially, choose gentle routes among familiar terrain or risk ______ shoulder-carriers!

A．long-term
B．elongated
C．prolonged
D．lengthened
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Mary has brown hair. In fact, it's quite similar in shape ______ yours.
A．with
B．to
C．like
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单项选择题
Trees that ______ the view of the oncoming traffic should be cut down.
A．block
B．inhibit
C．spoil
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