______,they couldn't solve the mysteryA)as they tried hard B)tried as they hard D)hard as they tried D)no matter they tried hard请说明选择的原因,并翻译全句2)______,the crops would be saved.A)it should rainB)it rainsC)should it rainD)it w

They couldn't find a house _____ _____ ______(居住） they ______(appear) in the fog.we couldn't see them at all. 4.The students couldn't help ______ when they heard the joke.A.to laugh B.laugh C.laughing They couldn't agree with each other they couldn't have done better是什么意思 They couldn't help ______when they heard the news. 改错They couldn't find such books that they needed. I couldn't sleep the night b_____ the shoe.The fans shouted _____ (兴奋地) when they saw the stars.______(捐赠) are always welcome. My father couldn't find his ______ (lose) bike they couldn‘t see anything unusual改成同义句 No one could account for it.They couldn't ______ it.a．explain b． estimate c． interpret d． descNo one could account for it.They couldn't ______ it.a．explain b． estimatec． interpret d． describe这个题为什么不能选c,c不是也有 They couldn't play football _______ because they had ______ homework to do.A.often enough; much B.enough often; much C.often enough; many D.enough often; many They aren't ______ books .They are yours.(they) ______,they couldn't solve the mysteryA)as they tried hard B)tried as they hard D)hard as they tried D)no matter they tried hard请说明选择的原因,并翻译全句2)______,the crops would be saved.A)it should rainB)it rainsC)should it rainD)it w 1.When they heard the news,they burst into tears.When______the news,they couldn't help______2.Their new school is twice the size of the old one.Their new school is ______ ______ ______ ______the old one.3.This also protects the air,soil,water and cro 翻译:they looked for the treasure for many days,but they still couldn't find any 句型转换:They were so frightened that they couldn't move. They did that because they couldn't understand the nature.这句话哪错了