题目内容

Hundreds of businesses spend vast _______ of money on marketing to attract new customers.

A. numbers
B. extents
C. amounts
D. investments

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Last fall, he decided to quit teaching to _______ all his time to building the company.

A. invest
B. devote
C. spend
D. put

I write letters to myself and show them to my friends,________they're from my girl friend.

A. informing
B. pretending
C. realizing
D. proving

The________of blood always makes her feel sick.

A. sight
B. view
C. look
D. form

I'm________that livingdisconnected from the Internet can be a very valuableexperience.

A. believed
B. thought
C. supposed
D. convinced

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