【2013山东潍坊】You mustn’t go off on your own, because you _____get lost in the mountains.
– Mr Green has_____ one-year-old son, doesn’t he?–Yes, and he also has ______eight-year-old daughter.
It will ______us several years to learn a foreign language well.
–___ _ the population of China?–_______ over 1,300,000,000.
We have a lot of work ______ today.
In the piano contest, my brother didn’t play well and I did_____.