Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions

Câu hỏi

The first actual robot ____ invented in 1961.

A. was

B. has been

C. used to

D. were

Đáp án
A. was

Câu hỏi thuộc Bài tập:

UNIT 5: INVENTIONS - VOCABULARY AND GRAMMAR (1) - Bài tập Tiếng Anh lớp 10 - Global Success