Identify the one underlined word or phrase that must be changed to make the sentence correct.

Câu hỏi

Unless you pour oil on water, it will float.

A. Unless

B. pour

C. on

D. will float

Đáp án
A. Unless

Câu hỏi thuộc Bài tập:

E9- TĐ- Unit 7 - Practice 3