【正文】
it is B. this is C. this D. that ( ) are my teachers. A. That B. It C. Those D. This ( ), these ________ my sisters. A. is B. are C. am D. be B 單元語法聚焦 二 C B ( ) ________ my sister and these ________ my parents. A. is。 is C. is。 are A 解析 考查系動詞的用法。 單元語法聚焦 二 ( )5.— Is that his brother? — ________. A. Yes, he is B. No, he isn39。 C 單元語法聚焦 二 ( )6.— Is this your brother? — No, ________ is my cousin.