The police set out in search of other children who might ______ Guizhou’s dustbins after 5 deaths for warmth. 

Don't go too far into the sea, children, or the waves will _____ you off your feet.

After trying many times , they had to      the hope of saving the seriously-wounded elephant.

Our teachers often ask us ______ over the answers carefully before handing in our papers.

Some people are good at ________ but bad at giving back.