__________，I think, and you will settle the problem.
| A．So long as you keep up your spirits |
| B．If you make your effort |
| C．Making great efforts |
| D．A bit more effort |
Traffic restrictions have come into effect in Beijing ______to improve the capital’s air quality and traffic situation for the 2008 Olympics．
| A．in order that | B．in an attempt | C．at an attempt | D．in a try |
President Hu Jintao urged that every effort to_____rescue and treat the injured when the earthquake happened in Sichuan this year．
| A．is made | B．must be made | C．should make | D．be made |
Platypus is a strange animal that lays eggs but _____ milk _____ its young．
| A．feeds；to | B．feeds；for | C．fed；at | D．fed；on |
About 85％of the Australian population of 20million______in the six major cities around the coast nowadays
| A．has lived | B．live | C．1ivcd | D．1iving |
Every family in America has had this sort of experience______there was a price increase of nearly one-third in the past two years
| A．that | B．which | C．what | D．when |