单项选择题

Why does the writer say" at the risk of inflation" （）

A．Because he feels that he might be exaggerating
B．Because he has recently praised more works than usual
C．Because he finds it hard to be objective
D．Because he feels he may not praise the work sufficiently

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单项选择题

The underlined part keep an anxious eye on the state of his currency means （）

A．take care not to be over-critical in his writing
B．watch carefully to see that nobody else takes his job
C．be careful to ensure that his comments retain their value
D．be sure that his salary keeps pace with inflation

单项选择题

We know from the passage that （）

A．exposure to even tiny amounts of radiation is fatal
B．the effect of exposure to radiation is slow in coming
C．radiation is avoidable in space exploration
D．astronauts in spacesuits needn't worry about radiation damage