I still remember ______ to the south where we attempted _____ the river, which proved to be dangerous. 

___ to give up smoking, he threw away his _____ cigarettes．

The secretary worked late into the night, ______a long speech for the president.

When I reached home, my husband was lying on the floor, ________ the kids with toys.

_____around, I find many people willing to pay a little higher price for things ____are friendly to the environment.