几个英语问题。选词填空。请讲解。

几个英语问题。选词填空。请讲解。
1.Her mother was too excited to hear the news that she couldn't help ___. A.crying B.to cry
2.The place ___(where/that) some great men were born are familiar ___(to/with) the people all over the world.But it was in the past ___(when/that) there were very poor.
3.The number of people who ___(was/were) invented to the meeting were forty,but a number of them was absent for different lessons.
4.——___ day it is!It's rainy again. ——So it is,wo won't go for a picnic. A.What a bad B.How bad a
5.He looked ___(happy/happily) at the delicious food and looked quite ___(happy/happily).
6.Not only he but also I am interested in math,that is to say,___(either/both) of us showa interest in math.