---________beautiful skirt !---Thank you.
Lily doesn’t know ________ she and her friends can do to help the little boy ________ parents have left their hometown for making money.
— I’m not going swimming tomorrow afternoon. — ________. I have to clean up my bedroom.
— Look at the boy playing basketball on the ground. Is it George? — It ________ be him. He told me he would play basketball after class, but he’s not sure.
The thing that matters is not whether you fail or not, ________ whether you try or not.
Lanzhou is the only capital city that the Yellow River, the second ________ river in China, passes through.。