Question

【題目】Various efforts ________ in the past decades to protect the environment.

A. had made B. have made

C. were made D. have been made

Answer 1

【答案】D

【解析】考查時(shí)態(tài)和語(yǔ)態(tài)。句意：在過(guò)去的幾十年里，為保護(hù)環(huán)境做出了各種努力。根據(jù)in the past decades可知句子用現(xiàn)在完成時(shí)態(tài)，efforts是句子主語(yǔ)，復(fù)數(shù)形式，和謂語(yǔ)動(dòng)詞make之間是被動(dòng)關(guān)系，所以此處用現(xiàn)在完成時(shí)態(tài)的被動(dòng)語(yǔ)態(tài)，故答案為D。