yawns are said to be catching...翻译并解释语法?

they are said to be very good怎么翻译 翻译句子,并解释语法. 翻译一句话,并解释语法 If you are catching a train,it is always better to be comfor live news语法解释并翻译 they didn't have to be afraid of catching SARS如何对CATCHING SA 翻译并语法解释This country suffered shortage of food due to the sev I've just got to be really prepared.翻译并说明语法 We do not have to be a___ of catching SARS 翻译,并解释join为什么加ed?they said he would go to college if he (joi what are you going to do to help your parents at home?翻译并解释为 Organic vegetables are said to be more nutritous,_______to e