五、句型转换（本题共5小题；每小题1分，满分5分）
请根据要求改写下列句子，每空一词。
61. I think he will come here if he has free time.（改为否定句）
I _____▲_____ think he ___▲____ come here if he has free time.
62. The machine should be checked every week.（对划线部分提问）
____▲____ ____▲____ the machine should be checked?
63. They would rather stay at home better than go shopping when they were tired. （保持句意基本不变）
They ____▲____ staying at home ____▲____ going shopping when they were tired.
64. Tourists shouldn’t give food to the animals in the zoo. （改为被动语态）
Food shouldn’t ____▲____ ____▲____ to the animals in the zoo by Tourists.
65. The book with a purple cover is about information technology. （改为复合句）
The book ____▲____ _____▲___ a purple cover is about information technology.