The flowers his friend gave him will die unless__every day.

问题描述:

The flowers his friend gave him will die unless__every day.

watered除非每天浇水,否则他朋友给他的花就要死了。

(过去将来式)
朋友以前将他的花给他

横线填watered.除非每天浇水,否则他朋友给他的花就要死了.

他的朋友给花他的将于unless__every白天死去.