Listen! Is that Millie singing—No. It _____ be Millie. She has gone to Beijing.

We would hesitate to pull over to the side of the road ________ a stranger in a car wave us down.

shoes, clothes and a backpack are the basic ________ you need for your hiking

My suggestion is that he _________to see a doctor at once.

The people, ________ had been damaged by the flood, were given help by the Red Cross.