Shirley is still waiting for her flight to New York City _____ the airport.
介词
句意：Shirley 仍然在机场等待她飞往纽约市的航班。表示“在机场”要用 at 和 airport 搭配。
句型转换。
What's your father's job?（改为同义句）
What _______________ your father _______________?
—Where are you going,Jack?
—I am going to see a _____ because I have a cold.
根据答语中的“因为我感冒了”可推断，我要去看“医生”，故答案为选项C。
— How many _____ are there in your school?
— Twenty.
可数名词的复数形式
问句的含义是“你们学校有多少女老师？”。woman teacher 的复数形式是 women teachers，故答案为选项C。