第24题: [单项选择]When you drive home, you can't be______ careful. A. very B. too C. so D. only 参考答案:B 答案解析:[解析] 本题考查习惯用法“can't…too+形容词(副词)”或“can't…+形容词(副词)+enough”。这两个选项均意为“无论……都不过分”,因此选项B为正确答案。 [避错指南] 选项
第27题: [单项选择]The monument was constructed in honor of the explorer who was believed ( ) the river. A. to have discovered B. to have been discovered C. to discover D. having been discovered 参考答案:A 答案解析:
[解析] be believed to do sth. 意为“据说做了某事”,而“发现河”应该是已完成的事,故用完成时。故选A。