They kept＿＿＿（do）exercise,they are really healthy.You should write it＿＿＿（careful）

They kept＿＿＿（do）exercise,they are really healthy.You should write it＿＿＿（careful） They kept on walking ＿＿they found a lake.填while还They kept on walking ＿＿they found a lake.填while还是when? John kept ＿＿＿his homework for 2 hours.A.do B.doing C.to do D.does The touch they had both kept in ＿＿＿many years broke.A.for B.on C.into D.with The zoo kept some animals in the cages so that they would not hurt people.(改写句子,原意不变)The zoo kept some animals in the cages＿＿ ＿＿that they would not hurt people.2.Are we supposed to wait here until 12:00?(同上)＿＿ we wait We do morning exer in the morning 中的in可以改成on么? People＿＿dogs for millions of years.A.kept B.kPeople＿＿dogs for millions of years.A.kept B.keep C.has kept D.have kept Where do they come from? 怎样改成Where ＿＿ they ＿＿ ＿＿? It seems that they do nothing except e＿. kept on they had this really low doorway and I （kept on） hitting my head on it.这里填 kept on He kept talking with others in class.（保持原意）He ＿ ＿ talking with others in class. they kept the door （ ） the whole nightA opend B opens C opening D open They are only kids,but they can work together when they decide to do something almost＿＿＿＿A.unpleasant B.upsetc.impossible d.strange They ＿（do）their homewok carefully every day（用所给动They ＿（do）their homewok carefully every day（用所给动词的正确形式填空） Our room must ＿＿clean.A.keepB.be keptC.to be kept D.to keep Do you know ＿Guangzhou tomorrow?A.whether they leave for B.whether will they leave forC.whether they are leaving for They have much home＿＿＿［do］ this weekend. They kept their plan dark.英译汉They kept their plan dark.译成汉语是何意?