---When shall I call you, morning or afternoon? ---________ is OK. I will be free all day.

 --- How many of you have solved the math problem?--- ________, the math problem is far too difficult for us to work out. .

—Who’s that at the door?—          is the milkman.

I met several people there, two of _____ being foreigners.

 ---Is your school life like ______ of other teens? ---In many ways, yes.