He’s good ___ swimming.Swimming is good ____ his health.
Guangdong is _________the southeast of China.
My parents want to go ______ on vacation.
—My brother and I will go to the library tomorrow. —. Shall we go together?
—Mr. Wang’s never been to Canada, has he? —. He went there on business last week.
—Which would you like, tea or coffee? —Either OK, but I prefer coffeemilk.