Mary is _____ than her cousin.

Why do English people talk so often about the weather when they start a talk? — Because the weather is a(n) ________ topic (话题).

Sometimes parents find ______ hard to communicate with their children.

Hello, may I speak to Millie? —Sorry, she isn’t in. She _________ Nanjing.

Is there _______ juice in the glass?—Yes, there is_______.