1A thermos is used ( ) keeping hot.AofBinCoffDdown 2They had learn one thousand English words...1A thermos is used ( ) keeping hot.AofBinCoffDdown 2They had learn one thousand English words ( ) the end of last term.AatBinCbyDon第1题选择并说明
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![1A thermos is used ( ) keeping hot.AofBinCoffDdown 2They had learn one thousand English words...1A thermos is used ( ) keeping hot.AofBinCoffDdown 2They had learn one thousand English words ( ) the end of last term.AatBinCbyDon第1题选择并说明](/uploads/image/z/12218227-43-7.jpg?t=1A+thermos+is+used+%28+%29+keeping+hot.AofBinCoffDdown+2They+had+learn+one+thousand+English+words...1A+thermos+is+used+%28+%29+keeping+hot.AofBinCoffDdown+2They+had+learn+one+thousand+English+words+%28+%29+the+end+of+last+term.AatBinCbyDon%E7%AC%AC1%E9%A2%98%E9%80%89%E6%8B%A9%E5%B9%B6%E8%AF%B4%E6%98%8E)
1A thermos is used ( ) keeping hot.AofBinCoffDdown 2They had learn one thousand English words...1A thermos is used ( ) keeping hot.AofBinCoffDdown 2They had learn one thousand English words ( ) the end of last term.AatBinCbyDon第1题选择并说明
1A thermos is used ( ) keeping hot.AofBinCoffDdown 2They had learn one thousand English words...
1A thermos is used ( ) keeping hot.AofBinCoffDdown 2They had learn one thousand English words ( ) the end of last term.AatBinCbyDon第1题选择并说明理由;第2题选C,为什么不选A,两者的区别?
第一题答案是C,是它有误吗?
1A thermos is used ( ) keeping hot.AofBinCoffDdown 2They had learn one thousand English words...1A thermos is used ( ) keeping hot.AofBinCoffDdown 2They had learn one thousand English words ( ) the end of last term.AatBinCbyDon第1题选择并说明
1.选C.但是Off(介词)不是跟used搭配的.
你可以查询off的意思.就是热水瓶是用来隔开(外界的温度)进行保温.
2.C by是表示到上个学期末为止(一段时间).at只是表示在期末时(一个点不表一段时间).