题目内容
【单选题】The new president said she would _________ herself to protecting the rights of the old and the homeless, who are otherwise helpless and vulnerable.
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【单选题】Cell phone conversations, which are fairly _________on commuter trains, can be annoying to fellow commuters.
【单选题】Ask your doctor whether a low-fat diet and a daily walk will _________to reduce your high blood pressure.
【单选题】The_________ from tourism is the biggest single contribution to GDP in the Maldives; every year many tourists from all comers of the world spend their holidays there.
【单选题】Since the beginning of this century, China has built many modern conference centers with underground parking, air-conditioning and _________translation systems.
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