The Nanjing Yangtze River Bridge is still very strong, ___________ it is almost 43 years old.
--- How long have you _________the bicycle? -- For two weeks.
Jack _______ school two years ago and he______ for two years. A. left, has gone B. left, has been away C. leaves, has been away
---Could I clean the bedroom for you? ---No, thanks. I _______ it myself.
-Have you read this book? -Yes.I _______ it two weeks ago.
Sixteen-years-olds shouldn’t ______ to go to an Internet bar.