［A］ that
［B］ what
［C］ which
［D］ those

二、为了避免重复，that或those来代替前边的名词或代词，that表示事物，those表示人。一般来讲that表示单数或不可数，而those表示复数。但those可以和who连用，由who引导一个定语从句，这时those就不是代替前边的某词

4) Numerous efforts have been made ［A］ to improve ［B］ the laws governing ［C］ air pollution， but none have been as successful as them ［D］ devised by the state of Oregon.

5) An internationally famous ballerina ［A］ ， Maria Tallchief demonstrated ［B］ that the quality of ballet in the United States could equal those ［C］ of the ballet in Europe ［D］ .

6) Since the job was going to be ［A］ difficult， he asked only ［B］ them ［C］ he trusted to assist him ［D］ .

7) Forest animals ［A］ utilize the sense ［B］ of smell less ［C］ than them ［D］ in the countryside.

三、such修饰可数名词须与a连用，也可修饰可数名词复数和不可数名词

8) Let us take a serious, reasonable look at what the results might be if proposal were accepted.

［A］ so many
［B］ a so many
［C］ a such
［D］ such a

9) Although signs of dishonesty in school, business, and government seem much more numerous in recent years than in the past, could it be that we are getting better at revealing dishonesty?

［A］ so
［B］ those
［C］ such
［D］ such a

四、例题解析

1) B为正确答案。此题中的differ from意为“不同于”，相比较的对象为“现代的图书馆”与“以往的图书馆”，故应选B ，用those代替前面提到的libraries(复数)。

2) D为正确答案。“has exceeded”“超过，超越”，空档后“spent on public health”作定语，而空档处是代词代替“The amount of monay”，这是不可数名词，所以“［A］ one”和“［B］ those”均不符合条件。“［C］ it”也不对，it代词代“the amount of money spent on cosmetics,”那么空档后的“spent on public health”显然与“spent on cosmetics”相矛盾。所以C也不对。

3) D为正确答案。“what”和“which”为连接和关系代词，“that”指代单数，而空档处是代前边的“The clture and customs of America”，所以应当用复数代词those。

4) D错。 改为those。这里“those”与“none”同指，都代“the laws”。

5) C错。 改为that，代“the quality。”

6) C错。改为those。C处作“asked”的宾语，又作“he trusted to assist him”的先行词。

7) D 错。 改为those。

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