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

While our dad _ the gardening, my brother _ the lesson.

A. did - revised

B. did - was revising

C. was doing - revised

D. was doing - was revising

Đáp án
A. did - revised

Câu hỏi thuộc Bài tập:

While our dad _________ the gardening, my brother _________ the lesson.