题目内容
20．I usually go to school on time．But Iwas （be） late for school today．分析 我通常按时上学．但是今天我上学迟到了．
解答 答案：was
根据上文I usually go to school on time可知我通常按时上学．强调的是经常性习惯性的动作，故为一般现在时态，结合题干But I…（be） late for school today．可知今天我上学迟到了．可知强调是一件发生过的事情故确定为一般过去时态，根据所给系动词be的过去式为was/were，根据主语为I，故答案为：was
点评 本题考查用所给单词的适当形式填空，首先要根据语境明确句意，然后再根据相关语法对所给单词在形式上做出正确的变化．
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| answer travel stand up card politely |
However，in London，every teenager from 11to 15 years old must sign the"courtesy pledge （文明宣言）"．It orders teenagers to behave （103）politely when they travel in the capital．If they don't give up their seats to old，pregnant （怀孕的） or disabled people，or behave impolitely，they will lose their free travel （104）cards
Does that mean they will lose their free cards forever？The （105）answer is no．If they want to get their cards back，they need to carry out unpaid community work．
"Young people enjoy （106）traveling for free，so they have to take responsibilities （责任）．London Mayor （市长） Boris Johnson said．