题目内容
（请给出正确答案）
[主观题]
________ is the largest and longest river system in Canada.
A、The St. Lawrence River
B、The Fraser River
C、The Mackenzie River
D、The Yukon River
提问人：网友susan1169
发布时间：2022-01-07
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Tell me about an environmental problem that is facing your country.
You should say:
--what the problem is;
--how it arose;
--how it influences life in your country and explain how this problem could be solved.
You will have to talk about the topic for one to two minutes. You have one minute to think about what you're going to say. You can make some notes to help you if you wish.
