discard|discarded|discarding

她决定丢弃三张小牌，希望能得到更好的组合。

She decided to ___discard three low cards to improve her hand.

他把旧玩具都扔掉了，因为它们已经破损不堪。

He ___discarded all the old toys because they were broken.

他正在丢掉废纸。

He is ___discarding some waste paper.