[ Vocabulary ]
A. real or imaginary line through the center of an object
B. to turn about on an axis or a center
C. the surface of the land and its features
D. an organization in the United States that directs space travel and research
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When vs. While Passive Voice Cleanup vs. Clean UpPre-intermediateQuantifiersPresent Progressive TensePast simple vs Present perfectPresent Continuous, Present Perfect and Used toGerund or to Infinitive
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Todd ＿＿＿ Mr. Chen write the dos and don’ts for the library when（當……時）everybody had lunch in the classroom.
Vocabulary › View
a round open container with a handle, used for carrying liquid and substances such as sand or dirt
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