make question and answers wh\ith " why..? - because...
1. he/go/library/five times/ weeks?- have/ exam/ next week
2. his son/ have/ toothache/ last week?- eat/ alot of/ sweek
3. she/ be/ tired? - stay up late/ last night
4. they/ be/ often/ late/ school?- oftenget up late
5. tam/ buy/ a lot of/ toys? want to give her children
6. lan/ not/ come/ party/ last sunday? - be/ busy