1. It has been estimated that ________ one hundred thousand men participated in the gold rush of 1898.

(A) approximate
(B) until
(C) as many as
(D) more

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1. ________ did Arthur realize that there was danger.

(A) Upon entering the store
(B) When he entered the store
(C) After he had entered the store
(D) Only after entering the store

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1. If more than five thousand dollars in monetary instruments is transported into the United States, a report needs ________ with the customs office.

(A) file
(B) filing
(C) to file
(D) to be filed

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1. Since the earth’s crust is much thicker under the continents, equipment would have to be capable of drilling through 100,000 feet of rock to investigate the mantle ________ .

(A) beneath them
(B) beneath their
(C) beneath its
(D) beneath they

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1. When Henry arrived home after a hard day at work, ________.

(A) his wife was sleeping
(B) his wife slept
(C) his wife has slept
(D) his wife has been sleeping

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1. Pioneer men and women endured terrible hardships, and ________

(A) so do their children
(B) neither did the children
(C) also the childs
(D) so did their children

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1. ________ a teacher in New England, Webster wrote the ‘Dictionary of the American Language’.

(A) It was while
(B) When
(C) When was
(D) While

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