We()your terms satisfactory and now send you our order for your products.

()your check is received within a week we shall have no alternative.

A、Unless
B、As
C、If

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However, some tend to purchase intangible ones, like shares, futures, etc.()

A. 然而，一些人趋向购买无形的资产，他们喜欢股票、期货等。
B. 然而，一些人趋向购买无形的资产，例如股票、期货等。
C. 然而，一些人趋向购买无形的资产，他们喜欢分享期货等。

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