Scientists say it may be five or ten years___________ it is possible to test this medicine on human patients

Let me help you cross thestreet —! I’m not that old

I won’t call you ________ something unexpected happens.

I don’thave a partner to practice English_____. –Why not join an Englishlanguage club to practice_____

Don’t you think that funny Johnson is really ______failure—But ______ book he wrote is very popular withteenagers.