【题目】(2018无锡) It's________ (high) possible that humans have to move to Mars in the future.

【题目】(2018长春) It is________ (polite) to talk loudly in public places like a library.

【题目】(2018贵阳) To achieve our dreams, we must take every life choice ________ (serious).

【题目】Have you got any books on English grammar? I want to borrow ________.

【题目】When we got to the park yesterday, ________ started raining.

【题目】How is the weather there? I hear it is a bit hotter than________ in Hebei.

【题目】Look! Sonia looks worried. There must be ________ with her.

【题目】There is ________ in the classroom. They're in the physics laboratory now.

【题目】To be happy, ________ should know giving is more important than receiving.

【题目】People gave us plenty of good suggestions and we took ________ in the new show.