This book is very ___________ and I am ___________ in it.

Are you and your parents going to visit friends in Shandong?–Yes, and while we ____ with them, we’re going to spend a few days in Qingdao.

It’s four o’clock in the afternoon. The boys __ in the pool.

What’s she doing _____vacation?—She’s _____.[ ]

Why do you look so worried?—I’m expecting a call from my son. He London for three days.