1. The teacher and principal _________ carried out a new plan recently.
A.has B.have C.had D.are
【答案】：A
The teacher and principal 是双重身份,指一位既是老师又是校长的人,应该用单数的谓语。
2. Not only I but also Jane and Mary________ so bored of one test after another.
A. is B.are C.am D.be
【答案】：B
not only...but also...连接两个并列主语时，谓语动词人称和数的形式由邻近的主语决定，所以答案应为表示复数的助动词。
