You must know it is unusual是什么意思?

You must know it is unusual是什么意思? You must know that it is bad for your health though you haven't ____.A:found it B:found out it选哪个 为什么 You must careful.It is dangerous.改错 If you must know her name,her name is Mabel. do you know what--------(it)name is That is all you know about it Do you know where it is ?是什么意思 You know my heart is it? Do you know what it is? You Know How It Is 歌词 Do you know what time it is 还是is it? ----Amazing!You ——wear slippers at work.---Do not you know it is a fashion?A must B should C can D may ---Tom,where is my dog,do you know?---It's in the garden.You must ______.A.look after it B.look for it C.look it after D.look it for 应该是Do you know what is it 还是Do you know what it is do you know where it is 为什么不是do you know where is it? ---Do you know whose dictionary it is?----It()Li Lei's.His name is on it.---Do you know whose dictionary it is?---It()Li Lei's.His name is on it.A.can beB.must be C.may be D.might be what do you know about the sea?you must have seen it.some of us have swum or bathed in it.it looks beautiful on a fine sunny day and it can be very rough when there is strong wind. You must know that he is bad ( ) you though you haven't ( ).A. for,seen it B.to, fount it C. to, found that out D. for, found out it 是选C吗?Why?