To save the drowning child，the boy plunged into the icy water without hesitation，_______his own safety．

ssible means ____ to prevent the air pollution,but the sky is still not clear.

All 5 children of the Blacks, _______ are now working abroad, will come back for their parents’ 50th wedding anniversary.

______ this —It’s a pen.

your strength, you have got to know who you are and listen to yourself before doing anything else.