It’s necessary _________ us _________ more trees in spring every year.
| A．of; to plant | B．for; to plant |
| C．of; planting | D．for; planting |
—Do you have a tennis ball?
—____________. Let’s ask Jim for help.
| A．Yes, I don’t | B．Yes, I do |
| C．No, I don’t | D．No, I do |
—Do you like history?
—Yes. I think it’s _________. I can know much from it.
| A．boring | B．difficult |
| C．useful | D．busy |
—What’s her favorite __________?
—She likes strawberries best.
| A．fruit | B．color |
| C．sport | D．subject |
We have nice socks __________ very good prices.
| A．at | B．for | C．with | D．in |
His brother is _________ years old. This Monday is his _________ birthday.
| A．twelve; twelve | B．twelfth; twelfth |
| C．twelfth; twelve | D．twelve; twelfth |