since john is in rather poor health,he can hardly resist catching colds.since 为什么不用although

since john is in rather poor health,he can hardly resist catching colds.since 为什么不用although what is the different between rat and mouse in English? 六.阅读短文,A Clever Rat A folder is in the room.A fish is on it.A rat comes out.He sees the fish.A cat is in the room,too.He sees the rat and comes at the rat.“Don′t eat me,” says the rat to the cat.“You like fish.I have a nice fish for John's father__mathhematics in this school ever since he graduated from Harvard UniverJohn's father__mathhematics in this school ever since he graduated from Harvard UniversA:taught B:teaches C:has taught D:is teaching A rat in the jam. 如下````She studies harder than any other students in her class.= She .than other students .It is five years since John bought his car=John had owned his car for five years.这样改写 是否正确? rat rat? is,in,John,the,music连成一句话 John ____the factory since 1984 . John　has　worked　as　a　sales　manager　since　he　（join）____this　company　in　2002. John got sick last january and in bed since then.中填什么? john and i(be)____good friends since we were in kindergarten. John _____ up early since his childhood.A.is used to get B.has been used to get C.used to get D.has been used to gettingWhy Where is the mistake in 哪位高手讲解下SINCE的用法I haven’t heard any noise since I slept译为“我醒后还未听到任何声音”.John is now with his parents in New York,it is already three years since he was a teacher约翰现在和父母一起住在纽约 john always makes noise and sleeps in class john is a ________boy in class Have a rat in my stomach A rat has nuts in the hut.