[ Past Perfect and Past Perfect Continuous Tense ]
The past perfect continuous tense emphasizes _______________.
A. that an event has finished.
B. habitual activities in the present.
C. that one event was interrupted by another event in the past.
D. the duration of one event in the past, before another event interrupted it.

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Grammar › ViewYou_______ eat or drink in class.
A. must
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Mr. Rodrigo, who is my father’s friend, (treat, treats) me like his own son.
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a. back
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The factory was fined for discharging chemicals into the river. The underlined word has the closest meaning to:
A. charging
B. throwing
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