—We should do what we can ________ the endangered animals.—Yes, it’s our duty_________ them.A．save;

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• He always spends______money ______books.A．much too ;buyingB．too much;buying C．too many;to buyD．too m
• He used to _______in the sun ,but now he is used to ______at night.A．read;readB．reading;readC．read;
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