Sean’s strong love for his country is            in his recently published poems.

---How is your mother doing? Is she ________? --Oh, thank you. As a matter of fact, she _______. 

---Have you called Mr Johnson’s office? ---Yes．He ____back before tomorrow noon．So he can attend our meeting on time．

China's present environment situation is from bad to worse and if we _________ now to protect the environment, we’ll live to regret it. 

—Have you ____ been to our town before?—No, it’s the first time I ___ here.