从a、b、c、d 四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。 1. when i reached front door, i suddenly saw strange sight last night. a. the;不填 b. a; the c.不填a d. the; a 2. as we all know，it is impolite to read others’ letters without their permission. a. selfish b. published c. private d. public
