阅读短文，选择最佳答案。
A young man goes to the city and buys himself a pair of socks. When he comes back home, he goes to his
room and tries them on. He finds they are in different colours. One is blue and the other is green. He goes into
the kitchen. His mother and his sister are cooking dinner. He says to them, " The new socks are in different
colours. I should make them in the same colour. Would you like to do this for me? " His mother and sister are
busy and they don't say anything. When his mother finishes cooking, she goes to her son's room and makes
the green sock in blue. She comes back without saying a word to her son. After supper, his sister goes to her
brother's room and makes one blue sock in green without saying anything to anyone.
1. They young man buys the socks, and then ____________. [ ]
A. he buys a ticket
B. he comes back home
C. he tries them on at once
D. he puts them on at once
2. No one answers the young man because ______________.[ ]
A. they don't want to help him
B. they want to help him without telling him
C. they are busy at that time
D. they are very lazy
3. His mother changes the colour of one sock _____________. [ ]
A. before cooking
B. when she finishes cooking
C. after supper
D. before she goes to bed
4. ____________ is the last one to change the sock's colour. [ ]
A. The young man
B. His mother
C. His sister
D. His father
5. At last the socks are _____________.[ ]
A. in blue
B. in green
C. in white
D. in different colours