—Tom wants to know if you ________ a picnic next Sunday.—Yes. But if it ________, we'll visit the museum instead.
— Look! The girl with long hair is drawing a picture. Is she Sandy? — It ______ be her. I’m not sure.
We should do everything we can to protect the birds ______ danger.
I like ______ best. They look very tall for they have long legs and a long thin neck.
None of them have pity on the endangered animals. What ______ shame it is!
Most students don’t know ________ when their phones are taken away. A. what can they do B. how they could communicate C. who they can play with