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题型：单选题题类：真题难易度：普通

Sit down, Emma. You will only make yourself more tired, on you feet.

A、to keep B、keeping C、having kept D、to have kept

举一反三

The terrible train crash in Wenzhou has shaken the country, not only causing the loss of lives, but also ________ people ________ confidence in the rail system.

A new bridge has been built in recent years, only it much easier for cars to reach the hotel on the mountain top.

_________ along the old Silk Road is an interesting and rewarding experience.

With him ________ the way, we had little trouble finding the school.

When the boss came in, the workers pretended ______ hard on their machines.

He suggested that the problems ________ paid special attention to.

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