Question 1:
Smallpox .................................. millions of people before it ....................................
A. killed, had eradicated
B. killed, was eradicated
Feedback Use the simple past to talk about a finished event in the past. The passive form is used to fill in the second blank because small pox is not the doer of the action.
C. have killed, was eradicated

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Verbs Exercise - Test 3 | Exercise follow Topic