单项选择题
The people there seized the thief ______ the collar and took him to the police station.
单项选择题 We went ______ our plan carefully before we carried it out.
单项选择题 ______ the ______ of modem industry, the pollution is becoming more and more serious.
单项选择题 If you don't believe me, you'd better go to have a look at it ______ person.
