单项选择题

Lebanon is one of the few countries in the Middle East with a comparatively well- developed labour movement. Trade unions have secured some tangible gains, such as fringe benefits and better working conditions.

A．substantial
B．trivial
C．momentous
D．crucial
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单项选择题
Tile rivers and streams of the Amazon basin teem with life, and the forest canopy resonates with the cries of birds and monkeys and the whines of insects.
A．converges
B．echoes
C．overwhelms
D．responds
单项选择题
The day was crisp and sharp, but suddenly a misty rain began to fall and ______ the landscape.
A．hid
B．blurred
C．relieved
D．belittled
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