一Let’S throw a surprise party for mom’S 50th birthday.一That’s a good idea.We _________ several of her friends.
_______ on the top of the mountain is an ancient tower ______ back to two hundred years ago.
______in a new country,I was scared and feeling pretty anxious.
If I were any younger,I would do ________I am interested in.
There is no need______,because the flight has been canceled.
I hear they've promoted Tom,but he didn't mention______ when we talked on the phone.