1.It has been____that over 250 people died in the airplane disaster.

a.estimated
b.established
c.evaluated
d.engaged

2.The lecture is so dull that I feel____to death.

a.tired
b.boring
c.exhausted
d.bored

解析：

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1.答案选a.此题为词义辨析题.estimate和evaluate为近义词,前者意为“估计，判断”，后者意为“把......定值，估价”.establish意为“建立，确立”.engage意为“从事，订婚”.

2.答案选d.tired意为“疲劳的，厌倦的”,通常是由于过度疲劳等引起的疲劳.exhausted意为“筋疲力尽”.boring指的是“令人厌倦的”,指事物让人觉的厌倦.bored意为“厌倦的,指的是由于事物的单调枯燥而感到厌倦.

1.Women always says a good husband should tolerate their____complaint.

a.eternal
b.external
c.internal
d.central

2.The____of this food includes vitamin, water and sugar.

a.compound
b.compact
c.composition
d.component

解析：

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1.答案选a.此题为形近词辨析题.eternal意为“无休止的，不变的”,external意为“外部的”,internal意为“内部的”,central意为“中部的，中央的”.

2.答案选c.composition在此句中意为“组成，成份”,component意为“部分，元件，部件”,compact作名词意为“合同”,compound意为“化合物，混合物”.