Beijing is one of the ______ in the world today.
| A．busiest cities | B．busiest city |
| C．busy city | D．busy cities |
-- Why don't you join us for breakfast? -- Sure! ______
| A．Good luck! | B．Congratulations! | C．What to do? | D．Why not? |
--Hi, John. ______ ?
--It's Lucy, my dog. Her leg is hurt.
| A．How are you | B．What's the matter | C．Who's that | D．What's Lucy like |
My sister ______ goes to bed early because she needs a lot of sleep every day.
| A．always | B．sometimes | C．hardly | D．never |
--You're in a hurry. Where are you going?
--To the cinema. Sue ______ for me outside.
| A．waits | B． waited | C．is waiting | D．was waiting |
_______ jeans were invented over 100 years ago, they're still in fashion today.
| A．Because | B．If | C．Although | D．Since |