小题1:This book is not useful for today’s students.
This book is ▲ for today’s students.
小题2: Mary has been in Hong Kong for a month.
Mary ▲ Hong Kong a month ago.
小题3: In the past people thought the earth was flat.
People ▲ to think the earth was flat.
小题4:The family didn’t have enough money to send her abroad.
The family couldn’t ▲ to send her abroad.
小题5:There were about fifteen people in the room, and most of them were women.
There were about fifteen people in the room, ▲ women.
