题干
—Hello, may I speak to Mr Green , please?
—Sorry. He ________ a meeting. Can you call him later?
A：has
B：is having
C：will have
D：had
答案(点此获取答案解析）
B
—Hello, may I speak to Mr Green , please?
—Sorry. He ________ a meeting. Can you call him later?
A：has
B：is having
C：will have
D：had
的图象
与x轴的左右两个交点的横坐标分别为
的取值范围为 （ ）