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

Câu hỏi

We have to ______ the natural resources of our country.

A. conservation

B. conserve

C. conserved

D. conservational

Đáp án
B. conserve

Câu hỏi thuộc Bài tập:

MODULE 13: WORD FORMATION (Exercise 3)