[单项选择]The reason why the toys most boys play with are different from those that girls play with is that______

[单项选择]The reason why the toys most boys play with are different from those that girls play with is that ______.

[单项选择]The toys most boys play with are different from those that girls play with because ______.

[单项选择]Why did most British people play sports


A. To keep fit.
B. To foster a competitive spirit.
C. Just because they are keen on this game.
D. Understand the game rules.

[单项选择]

Most boys, and many girls too, have at some time or other started a stamp collection. Stamp-collecting, or, to call it (21) its correct name, philately, (22) an increasing popular hobby from as (23) as 1854 -- for less than two decades (十年) after postage stamps (24) . Today the hobby numbers (25) are not only boys and girls, but also men and women from all ranks (阶层) in society. So rapidly (26) the interest in stamp-collecting increase in the United States of America (27) in 1921 the United States Post Office found itself (28) set up a special department to (29) the needs of collectors. At present the yearly (30) of this department total over three hundred thousand dollars.

21（）
A. that
B. so that
C. where
D. when