they had to work day and night. ____they____ ____work day and night?we should keep our rooms clean to fight the flu.____should we____to fight the flu?You should keep away from crowded places.You___ ___to the crowded places.

问题描述:

they had to work day and night. ____they____ ____work day and night?
we should keep our rooms clean to fight the flu.
____should we____to fight the flu?
You should keep away from crowded places.
You___ ___to the crowded places.