Just as the tree is the unit of a forest and the book the unit of a library, ___

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Just as the tree is the unit of a forest and the book the unit of a library, ______ the molecule is the unit of matter.

A．as

B．like

C．so

D．thus

答案

解析

略

举一反三

Anyone can borrow books from this library _______ he keeps them clean and returns them in time.

A．even if

B．unless

C．so that

D．as long as

题型：不详难度：| 查看答案

Mother shut the window ______ she might keep the insects out.

A．because

B．in order that

C．till

D．as

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They agreed to rent the house ______ the roof should be repaired.

A．on condition that

B．as soon as

C．when

D．unless

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The old woman has loved Tom _____ he were her son.

A．because

B．as

C．if

D．as though

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Substances will expand or contract ______ heated or cooled, but this is not the case with water.

A．when they will be	B．if they will be
C．as they being	D．when

题型：不详难度：| 查看答案