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【題目】Every year, trees ______ in our city in order to protect our environment.

【題目】He is an honest and capable student, so he was chosen ______ president of the student council at my school.

【題目】The boy kept trying ________ play a role in the new movie.

【題目】—Do you know who is the oldest ________ the three students?

【題目】Mr. Smith ________ our class into five groups.

【題目】A new play will be ________ in Moon Theatre.

【題目】—What do you want to be when you grow up?

【題目】We couldn't help but ________ when we heard the good news.

【題目】John doesn't know ________ with the matter.

【題目】________ have a mountain bicycle. We often ride for exercise.