题目内容：

6.Frank has saved a lot of money.He can buy the mountain bike.(合并成一句)
Frank has saved _________ money ________ the mountain bike.
7.I’m sure you’re thirsty..(保持原意)
You _________ ________ thirsty.
8.Helen took Li Hui to visit Cambridge..(保持原意)
Helen _________ Li H ________ Cambridge.
9.I need to work hard at English..(保持原意)
_________ ________ for me to work hard at English