根据句意用所给词的适当形式填空。

小题1: Jack usually checks his test paper ___________ (careful) before handing it.

小题2: Mary thinks ___________ (study) grammar is a great way to learn a language.

小题3: –What _______ (happen) to Dave on April Fool’s Day?  –He was fooled by his friends.

小题4: Students in this school want to be __________ (volunteer) during this winter vacation.

小题5:Liu Li was the ________ (win) of last year’s English Speech Competition in our school.

瑜伽生活中的四不原则是少吃或不吃肉类、不搞不不正当的性行为、不赌博和（）

A.少吃饭

B.睡觉

C.不服用任何致醉物

D.不工作