题目内容

n. an act of injecting sb with a drug or other substance

A. injection
B. inhabitant
C. grocery
D. generator

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n. a chemical element, which is a gas that is the lightest of all the elements. It combines with oxygen to form water.

A. fragment
B. governor
C. hydrogen
D. helmet

n. a machine for producing electricity;

A. generator
B. geometry
C. instruction
D. gratitude

n. things that are produced to be sold

A. genius
B. grain
C. goods
D. gauge

n. a large important organization that has a particular purpose, for example, a university or bank

A. illustration
B. foundation
C. instant
D. institution