填空题

If he had taken his lawyer’s advice, he (save) ______himself a great deal of trouble.

【参考答案】

would have saved

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单项选择题

A．It is seriously polluted.
B．There are few cars and factories.
C．The air is very clear.
D．It remains what it was ten years ago.

填空题

What should groups of 8 or more people do if they need a tour guide They should book one（）