题目

用所给的单词的适当形式填空 （1） —What are those in English?— (it's) chairs. （2） Look! My(book) are on the sofa. （3） My computer games (be) in the bag. （4） His(dictionary) are in my backpack. （5） I (not) know she is your sister. 答案：【1】They're 【1】books 【1】are 【1】dictionaries 【1】don't如图，在⊙O中，圆心角∠BOC=60°，则圆周角∠BAC等于（ ）A．60°B．50°C．40°D．30°