74.Look at the cloud! It will be _______(rain).

73. When spring comes, the _____ turn green (leaf)..

72.We should always think over about how to protect the environment around ____ (we).

71. Old people should be spoken to _______(polite).

70. Every time I fail the exam, the teacher _____ me and asks me not to give up.(鼓励).

69. Our city will become more and more beautiful in a few _______(年) time.

68. Who is the ________ (高) boy in your class?

67. Next Friday the students are going on their _____ field trip. (one)

66. The Great Green Wall has been built so that the earth is not easily ______ away. (吹)