______ will you finish the job —— In half an hour.

Did you get Wechat red（微信红包）during the Spring Festival—Yes. It’s the most popular way of sending traditional holiday presents now.

Some scientists have sent a spacecraft to Mars. It ____ several months to get there.

Which do you prefer, a CD player or a walkman—_______. I prefer a portable computer.

It is said that this is the biggest lab ________ they have ever built in their school.