解析: 考查短语辨析。句意为:这些年来,世界各地的科学家和医生们进行了大量的研究,希望能找到治疗癌症的办法。research为不可数名词,选项中只有a great deal of可修饰不可数名词;其它选项只能修饰可数名词复数。
答案: A
2.I recognized her as soon as I met her at the airport though we hadn’t seen each other for ages and she had changed________.
A.a large amount B.a great many
C.a great deal D.a lot of
解析: a great deal意为“大量,许多”,可作状语,用于修饰动词、形容词和副词。句意为:虽然我们很久没有见面,但我在机场一见到她就认出她来了,她变化很大。其余选项不可作状语修饰动词。
答案: C
3.The young teacher wants to help his students as much as he can,but________,he’d better help them learn on their own.
A.for one thing B.as usual
C.in other words D.on the other hand
解析: on the other hand另一方面,由but一词可知此处表示转折。for one thing一方面;as usual通常;in other words换句话说。
答案: D
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