为了估计一批产品的次品率，大华随机抽查了20件产品，发现有1件次品，他估计次品率为5%；小英随机抽取100件产品，发现有4件次品，他估计次品率为4%．谁的估计结果更可信为什么？

根据句子意思，用所给单词的适当形式填空，将答案写在答卷上。（每小题1分）

小题1:He sent his __________ (regard ) to his friends by e-mails.

小题2:Nowadays many young people prefer surfing the Internet to ________ ( read ) books.

小题3:She was ashamed of her son’s bad _________ ( behave ).

小题4:Jack was _________ ( disappoint ) at the news.

小题5:I’m not strong enough ________ ( carry ) the box upstairs.

小题6:Our classroom is on the _______ ( three ) floor.

小题7:Our Chinese teacher always speaks to us ______ ( gentle ). We all love her.

小题8:He tried to behave well to make a good ______ ( impress )on the teachers.

小题9:We have been busy _______ ( prepare ) for the exams these days.

小题10:After three years, the stadium ___________（take）shape at last.