Excuse me，may I have a word with Mr. Jackson？一I’m afraid he’s not＿now．He’s having a meeting upstairs．

一Are these Mary’s brothers—Yes, .

My mother used to make breakfast for _____ every morning, but now I do it myself.

Peter is ten years old. He is ______________ to go to school.

It is recommended that the exploration team take with them an extra set of equipment _____ unexpected emergency occurs[ ]