题目内容
3.Trains arereliable (rely),cheap and best for long-distance journeys.分析 火车是长途旅行中可靠,廉价和最合适的旅行方式.
解答 答案:reliable.分析句子结构可知,空格处和后面的cheap,best是并列结构,所以此处要用形容词形式作系动词,are的表语,表示"可靠的".
点评 本题考查词性,首先要分析句子成分,确定所填单词在句中所做的成分,然后根据要求得出答案.

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