It was President Xi Jinping ________ visited the navy troops and urged to strengthen naval force on April 9,2013.

1—_________riding our bikes to the park—Good idea.

They said they would have ____________ holiday.

A: May I go out to play football, DadB: No, you ________. You must finish your homework first.

My sister ______ text messages to me on the mobilephone,but now she ___ e-mails on QQ.