多项选择题

If you had________ (听从了我的忠告，你就不会陷入麻烦).
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单项选择题
Two Australian billionaires have been placed on the waiting list for entering space as private passengers.
A．Y
B．N
C．NG
单项选择题
The respiration of living things and the food production of plants are______.
A．separate processes
B．complementary
C．opposite
D．interdependent
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