Câu hỏi: What _________ computer a miraculous device?

A. makes

B. make

C. making

D. to make

Câu 1: She had worked as a tourist guide before __________ a teaching career.

A. starting

B. start

C. to start

D. started

Câu 2: Nylon ______________ in the 1930s

A. invented

B. was invented

C. is invented

D. has been invented

Câu 3: Another man-made satellite has _______ up into space.

A. sent

B. be sent

C. been sent

D. sending

Câu 4: Braille _________ a system of raised dots that can be read with the fingers by people who are blind.

A. am

B. be

C. is

D. are

Câu 5: Digital cameras is a wonderful ___________.

A. invent

B. invention

C. invented

D. inventing

Câu 6: The books ___________ have been read by the students should be put on the shelf.

A. who

B. whose

C. that

D. what