apple13810
.He had travelled only seven miles across the Channel when his engine failed 此句可理解为：他发动机失灵的时候，仅仅跨海峡飞行了几英里。之所以用had travelled ，是为了和从句的failed体现动作的先后顺序，即先飞行了几英里后，发动机才失灵，符合过去完成时的用法：过去（failed)的过去(had travelled)，故用had travelled.
小可爱mmd22
Fishing is my favourite pastime.So I would like to go fishing when I am free.Last saturday,I spent all day fishing,but,unfortunately,I didn't catch anything,though I tried my best.Worrying that my wife will laugh at me.So,I went to the market to buy some fish.I was very pround of myself to make my wife believe that it was me who got the fish..But my wife didn't congratulate me.She insteaded asking me,"Where do you get the fish?They are not very fresh!"
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