Exercise 1. Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions. (1.6 points)

Câu hỏi

The laptop’s battery _ out of energy when she _ the websites.

A. was running - surfed

B. ran - was surfing

C. was running - was surfing

D. ran - surfed

Đáp án
C. was running - was surfing

Câu hỏi thuộc Bài tập:

The laptop’s battery _________ out of energy when she _________ the websites.