He’ll be an astronaut by the time he ________ (be) thirty.
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It ________ (be) long before we know the result of the experiment.
The traffic in our city is already good and it ________ (get) even better.
This time next day they ______________ (sit) in the cinema.
关于温度的测量，为保证测量精度，高于500℃应选用（ ）来进行测量，500℃以下的中、低温应选用（ ）来进行测量。
A. 热电偶、热电阻
B. 热电阻、热电偶
C. 热电偶、热电偶
D. 热电阻、热电阻
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