Two weeks ago, I bought a bicycle. If you live in town, it is often faster than a car and you           worry about parking. 

—Must I hand in my homework now， Mr.Smith?—No，you ________.

–I’ve taken someone else’s green sweater by mistake.–It       Harry’s. He always wears green.

— Can I pay the bill by check?— Sorry, sir. But it's the management rules of our hotel that payment ______be made in cash.

Something terrible       have happened if Li Chang was not coming to eat in his restaurant as he always did.