—Would you like to go to the shopping mall with me tonight? —I’d like to, but I have to attend a lecture _______ in the school library. 

In the wartime, the masses devoted whatever they had to ______ the army in fighting against the Japanese.

He is so humorous that he had us       all through the meal.

 ________ with care, one tin will last for six weeks.

When I entered home,I found all the windows______and something______.