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1.1题目:During the () two decades， research has greatly expanded our knowledge about the sleep and dreams.
1.2题目:Can you tell me () about this city that makes people love it so much?
1.3题目:I have to book ahead for concert， () are usually held in London.
1.4题目:Water encourages the () of iron and oxygen to form rust.
1.5题目:The teacher asked each of us () what he had been doing.
1.6题目:When he was questioned about the missing ring， he firmly()that he had ever seen it.
1.7题目:Color blind people often find it difficult to () between blue and green.
1.8题目:She could hardly () laughing.
1.9题目:The bossy manager is always finding fault with his ().
1.10题目:Despite his father’s () objection， Darwin accepted the invitation to be a naturalist on H.M.S.Beagle during the voyage of exploration.
