Nobody believed his reason for being absent from class__________he had to meet his uncle at the airport.

My grandparents are very healthy. They always ______ after school.

Sometimes, boys are quite different from girls. What do you think of Paul—Paul doesn’t think as as Sandy. He often makes mistakes in his homework.

填入下面一段文字横线处的语句，最恰当的一组是（ ）（3分 ） 我们的思想愈深刻，我们的感受愈丰富，我们的情感愈细腻，我们借以表达思想、感受和情怀的语汇就愈需要丰富。内心的丰富会表现为语言的丰富，我们词汇的丰富和新颖，也就在一定的意义上意味着我们思想的丰富和新颖。我们可以通过对语言的锤炼来提升我们思想的品质。因为， 。

Why are you looking so –I began to clean the house early in the morning. I’ve been doing it all day!