I       sight of an empty seat at the back of the bus and went directly there.
A．lostB．caughtC．lookedD．took
B

試題分析： 考查固定搭配。A lose sight of 看不見B catch sight of 看見。CD搭配錯(cuò)誤。根據(jù)題意，我看到那個(gè)空座，直接走過去。故選B項(xiàng)。
考點(diǎn) 固定搭配。
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