单项选择题

It is essential that the temperature (is not) elevated (to a point) where the substance formed (may become) unstable and decompose into (its) constituent(组成的) elements.

A. is not
B. to a point
C. may become
D. its
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单项选择题
Part Ⅱ ClozeDirections: For each numbered blank in the following passage, there are 4 choices marked A, B, C and D. Choose the best one and mark your answer on the ANSWER SHEET with a single line through the center.
A．scold
B．criticize
C．accuse
D．blame
单项选择题
He was offered the presidency of that country but he declined it, saying that he didn't have good health.
A．inclined
B．decreased
C．refused
D．declared
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