--I wonder _____. -- Through “Didi”. It is easy.
A. How you came back home B. why you came back home C. when you came back home.
--Mom, could I have a new computer?-- ___. We don’t have enough money.
A. Sounds great B. I am afraid not C. Don’t mention it.
The self-service supermarket___ young people in big cities.
A. is known for B. is popular with C. is interested in
Stephen Hawking ____ wrote A Brief History of Time(时间简史)is a great British scientist.
A. who B. which C. what
--I hope the math problems won’t be difficult. --- If you prepare well, you can work them out _.
A. Hardly B. easily C. slowly
-- Excuse me, may I come in? -- sorry. Please wait on your chair ___ your name is called.
A. Because B. since C. until
