Tom with his parents ______ going to visit the forbidden cit

題目：

Tom with his parents ______ going to visit the forbidden city_____sunday morning.

解答：

is on
考查主謂一致,謂語和with 前面的主語保持一致 ,在某天早上我們用 on
再問： are on對不
再答： 不對，主語是Tom，所以用is
再問： 那爲什麼「樂知英語_Robin | 十六級 are,on」的回答是are on