7. Energy __________ are various in Vietnam, ranging from coal, oil, natural gas, hydropower and renewable energy.
A. power B. uses C. plants D. sources
8. Denmark gets twenty percent of its electricity __________ wind power.
A. from B. with C. in D. by
has some disadvantages. For example, it doesnt work at night.
A. and B. but C. so D. because
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