Don’t use words, expressions or phrases _____ only to people with specific knowledge.
Some time after the rockets and the space shuttle are _____, the rocket will _____ the space shuttle and ____ the sea.
---May I look at the menu for a little while?---Of course, ______ sir.
Considering his health, I advise him to ______ an hour or two each day to work out.
Riding bikes has advantages __________ driving cars ________ many aspects.
How can we get this language point _____ to the students.