【题一】Many common English words such as shampoo, pajamas and bungalow were first used on the Indian sub-continent and have its origins in the Hindi language.
(A) Many common
(B) such as
(C) were first used
(D) its origins
(E) No error
解析：The error in this sentence occurs at (D), where there is a pronoun agreement error. The singular possessive pronoun "its" does not agree with the plural noun to which it refers, "words," and should, therefore, be replaced with the appropriate plural possessive pronoun, "their."(这个句子中的错误发生在(D)，代名词一致性错误。 单数使用的代词“its”与它所指的多数名词不一致，即“words”，因此应该用适当的复数所有格代词“它们”代替。)
【题二】New analyses of a fossil suggest winged insects having possibly emerged as early as 400 million years ago.
(A) suggest winged insects having possibly
(B) suggest that winged insects may have
(C) suggesting that winged insects, they may have
(D) that suggests winged insects as having possibly
(E) that suggest winged insects to have possibly
解析：Choice (B) is correct. It avoids the error of the original by replacing the awkward and wordy "suggest winged insects having possibly" with the more precise and idiomatic "suggest that winged insects may have."(选择(B)是正确的。把 “suggest winged insects having possibly”，改为了更精确的 “suggest that winged insects may have。”)。而且没有改变句子的原意。
【题三】When people gave up the hunter-gatherer way of life and began to cultivate the soil and grow their food, they often became less mobile, built more substantial residences, and they developed more effective means of storage.
(B) became less mobile
(C) they developed
(D) more effective means
(E) No error
解析：The error in this sentence occurs at (C), where there is a flaw in parallelism. The pronoun "they" should be removed so that the sentence contains three parallel verbs ("became," "built," and "developed").(这个句子中的错误发生在(C)，在并行性中存在一个缺陷。代词“they”应该被删除，以便这个句子包含三个并行的动词(“became”，“built”，“developed”)。)
【题四】In Costa Rica, coffee, from the highlands, and bananas, produced mainly in the Caribbean lowlands, as the most important crops, they account for nearly half the total value of all exports.
(A) as the most important crops, they account
(B) as the most important crops, which account
(C) are the most important crops, accounting
(D) are the most important of their crops by accounting
(E) have been the most important crops, which accounts
解析：Choice (C) is correct. It avoids the error of the original by providing a main verb ("are") to agree with the subject of the sentence, "coffee and bananas."(选择(c)是正确的。它通过提供一个主动词(“are”)与句子的主语，“coffee and bananas”相一致。)