单选题 Please be careful with this old book. It's quite ______.

单选题 All of our workers are ______ to wear safety boots before they enter the factory.

单选题 In addition to your wage, ______ is provided.

单选题 On the last day of our holiday, we went shopping for ______.

单选题 Would you be ______ to help me for a few hours this weekend?

单选题 We should teach our children to pick ______ litter when they see it on the street.

单选题 I'm afraid that's not a ______ form of ID.

单选题 Volunteers on the Panda Care program need to have experience of working with pandas.