Well it's been up here two and a half years now,it's an infra-red detector that senses the earth's temperature with great accuracy ,中的it is been 这在语法上怎么解释阿,请前辈指点,

It's always been up to you It's very difficult to learn English well,but you can't___.a.put it up b.take it up c.look it up d.give it up He told me he had been offered a well-paid_,but he refused it.A.businessB.serviceC.workD.positionD正解. Well it's been up here two and a half years now,it's an infra-red detector that senses the earth's temperature with great accuracy ,中的it is been 这在语法上怎么解释阿,请前辈指点, it's well known Well!It's -Who shall we choose to make up our-Who shall we choose to make up our baseball team?-Well,＿ Harry,but he is not a very good player,I suppose.A.it's   B.he's   C.there's   D.that's -What's that noise?-Oh,＿ the wind s It's long been my dream to get on well with youEnd是什么意思 He -----（be）to the beach,so he knows it very well.填 has been to对吗, It's been awhile. it's been coverd.. Talk's all very well if you can back it up 什么意思 He finds it's really hard to learn English well.He finds _____ English well really _____. 英语翻译 he's driven that road hundreds of times and he knows it well 英语补全对话 在考试 非常急A:Good Morning,Doctor.B:Morning.What's your problem,madam?A:It's my son.He's not feeling well .He coughs badly and can't sleep at night.B:How long has he been _____this?A:For two years.B:Does he have a fever?A:No Can he do it well? It's always been up to you,这句的意思? It's up to