What happened to Mike—He had a stomachache. He began to work _______ having breakfast this morning.

－How did it that the secretary knew where we were?－Maybe he had been following us.

Have you ever been to Singapore—Yes. I there last year with my parents.

Johnny, what were you doing when the rainstorm came— _______. I was just sleeping in my bedroom.

I can hear the Browns’ phone bell ringing but no one is answering it; they _______ be at home.