先米团子
1. Rick is washing the dishes in the kitchen.2. We didn't go hiking yesterday.3. My father exercises for half an hour every morning.4. Is there a pay phone near here?5. How long do you brush your teeth?6. Marie was listening to music in the classroom 10 minutes ago.
明明来干啥
1)Ric is washing plates in the kitchen2)we didn't climb up the mountain yesterday3)my father does exercise an half of an hour on every day4)is there any payphone near by here?5)how long have you spend on brush teeth?6)Mary had listed to music 10minutes ago!
汉朝文帝
答案：is doing the dishes．根据题意需要译出清洗餐具，根据所给的动词do，联想到短语do the dishes表示清洗餐具，再者这里是说妈妈正在清洗餐具，用现在进行时am/is/are+doing，主语是三单mum，故答案是is doing the dishes．
一杯清茶NJ
1.Rick is washing dishes in the kitchen.2.We didn't go to climb the mountains.3.My Father excises for half a hour everymorning.
