在影响种群个体数目的因素中，主要是出生率和死亡率和年龄结构两大类。
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Mary never does any reading in the evening, _________.
A. So does John
B. Neither does John
C. So John does
D. So did John
------He used to go out for a walk after supper.------_______________.
A. So do I
B. So did I
C. Neither did I
D. So I do
------She has a nice watch.------_________________.
A. So has she
B. So she has
C. So does Jack
D. So he does
------Mary wasn't invited yesterday.------_________________.
A. So was I
B. Neither was I
C. So did I
D. Neither did I
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