顺次连结四边形ABCD各边中点得四边形EFGH，要使四边形EFGH为矩形，应添加的条件是 【 】
Helen is the_____person in her family． Her two elder sisters are both married．（ ）
older
oldest
younger
youngest
In a restaurant， people usually choose food and drink from the_____．（ ）
book
menu
newspaper
magazine
_____you smell something burning？ Go and see what's happening．（ ）
Can
May
Must
Need
It _____dark． Shall I turn on the light？（ ）
gets
got
is getting
was getting
Nancy， carrots are good for_____eyes． Eat some， please．（ ）
my
your
her
his
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