When I came back to my hometown again, I found it changed so much that I could hardly _______it。

Studies show that people are more        to suffer from back problems if they always sit before computer screens for long hours．

Visitors from the mainland used to     in Honghong for a flight toTaiwan.

Young kids! You'd better apologize to us，or we________the right to accuse you of cheating.

Don't leave the bread on the table; it will        .