题目内容

单子叶植物根和双子叶植物根的主要区别是维管束中没有导管。

A. 对
B. 错

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If you agree to_____, please e-mail us by return and we will approach you further.

A. propose
B. proposing
C. be proposed
D. our proposal

The faster the shipping, the the price.

A. lower
B. higher
C. common
D. quicker

One of our customers online asks Chinese black tea.

A. of
B. for
C. on
D. in

______receipt of your instructions we will send the goods.

A. In
B. Having
C. Upon
D. After

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