题目

完形填空Therelived a washerman named Bob in a village. He had two 1,a donkey named Bhola and a dog named Moti. Moti was used to 2 Bob's house and Bhola was used to carry the 3 to the river and back home.Onenight,when everyone was 4, a thief entered the house. Moti saw himbut didn't bark. On 5 this,Bhola asked Moti, You saw the thief and still didn't bark. What is the 6?Motireplied, You don't have to tell me about my 7.I've been taking care of this house for a long time. But our master doesn't seemto 8 this.He gives me less food and doesn't 9 mewell. If I allow this thief to 10, at least ou将金属锰（Mn）投入稀盐酸中，有气泡产生．将镁条插入硫酸锰溶液中，如果有锰析出，则Mn、Mg、Cu的金属活泼性由强到弱的顺序是A. Mn、Mg、Cu B. Mg、Mn、CuC. Cu、Mg、Mn D. Cu、Mn、Mg