should be kept informed 为什么不是kept informing?

secret should be kept...是什么意思? should be kept informed 为什么不是kept informing? Animals should not be kept in captivity. Should probably detain love 和Love should be kept. 哪个是因该把爱情留住 People should( )trees. A.be kept to cut B,be kent from cutting 选一下谢谢 Your clothes should always ____ clean and tidy.a.be kept b.kept 选B 为什么A不对呢? It is desirable that the automation equipment_running as much of the time as possible.A.would be kept B.must be kept C.will be kept D.should be kept People should ____cutting trees A be kept to cut B be kept from cutting C keep to cut D keep from cuA be kept to cut B be kept from cutting C keep to cut D keep from cutting 英语作文：Should animals be kept in a zoo?Why or why not? It is suggested that medicine should be kept b___ the reach of the children 英语翻译Something should be kept in heart all the time,goodbye. The classroom should be kept clean and tidy,____ ____?补全附加问句 The language lab should always be kept clean.(改为一般疑问句) all beepers and moble phones should be kept off during the meeting.keep time goes by,good friends should be kept forever.这句话什么意思?有没有语法错误? 'There' one be kept carefully.That's why I should be strong!谁能给我一个精确的答 If world peace _____ kept,every country should contribute its efforts.[A] should be[B] is to be并说明原因 States should give legal status to living wills,allowing individuals to demand that they not be kept alive artificially.