俩道英语改写句子~大哥哥 姐姐 帮下忙了

俩道英语改写句子~大哥哥 姐姐 帮下忙了
1.This story book is my brother's （划线提问）
______story book is this?
2.The students go abroad to futher their study (划线提问）
____do the students go abroad?
____do the students go abroad____?
____do the students go abroad______ _____?
PS:第一题划线句是：my brother's
第二题划线句是：to futher their study