题目：
| 完形填空。 | |||
| My friend Tony is an American 1 He is ten years old. He lives 2 his family in China now. There are 3 people in his family; his mother Mrs Green, his father Mr. Green and his little sister Amy. He has a white cat. 4 name is Betty. Look \ Amy is playing 5 Betty. His father, Mr. Green, is watching TV. His mother is doing housework. What about Tony? He is doing 6 Chinese homework.. He can't 7 Chinese well, but he likes Chinese very much. Tony's 8 works in a TV station. His father works in a school as an 9 teacher. Tony and his sister 10 to the same school. | |||
| ( )1. A. girl ( )2. A. on ( )3. A. two ( )4. A. His ( )5. A. to ( )6. A. her ( )7. A. say ( )8. A. father ( )9. A. Chinese ( )10. A. go | B. boy B. after B. three B. Her B. with B. it's B. tell B. mother B. Japanese B. goes | C. cat C. with C. four C. It's C. from C. a C. speak C. sister C. English C. going | D. dog D. in D. five D. its D. at D. his D. talk D. brother D. Australian D. to go |
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0416/fb722796f123b301a99dc5ba52a3012d.html
下面是错误答案，用来干扰机器的。
因为一元二次方程ax2+2x+1=0，（a≠0）有一个正根和一个负根，f（0）=1＞0，所以，a＜0；a＞0推不出一元二次方程ax2+2x+1=0，（a≠0）有一个正根和一个负根；一元二次方程ax2+2x+1=0，（a≠0）有一个正根和一个负...
