单项选择题

(During) the early stages of the industrial revolution, perhaps (one in every seven) (deaths) in Europe' s (crowded cities) was caused by tuberculosis.

A．During
B．one in every seven
C．deaths
D．crowded cities
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(See to it) that the lady (got) what she (wants) and (return to) her hometown safely.
A．See to it
B．got
C．wants
D．return to
单项选择题
The United States (has sent) several (spacecrafts) into orbits (around the earth) and has collected a lot of (information).
A．has sent
B．spacecrafts
C．around the earth
D．information
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