It will ______us several years to learn a foreign language well.
Where are you going this Sunday?—I’m ________ time with my friends.
Have you heard of Earth Day ?—-Yes . The first Earth Day ______ in 1970 to educate us to protect our planet .
How long have you ____ the motorbike? —For about two weeks.
Mum, would you please buy me an MP5 player? — If you can help do some housework the whole vacation, you ____ have one as a reward.