Excuse me. I’m looking for Be the Best of Yourself.—Sorry. The book you ask for ______ out.

More highways have been built in China, _____ it much easier for people to travel from one place to another.[ ]

Thanks to the joint efforts made by the leaders of China and the US over recent years, mutually _________ Sino-US relations have made remarkable progress.

Hobo is at home alone, he feels _______.

I’ll call your parents if your homework _______ before four o’clock today. — Sorry， Mr. Li. I’m doing it right now.