We must keep the noise under 50dB（分贝） here.The noise must ______ _英语解答

We must keep the noise under 50dB（分贝） here.The noise must ______ ______under50dB here

人气：422 ℃　时间：2020-04-16 13:05:23

解答

be kept
be controlled
变为被动语态吗?是的那就是了be keptbe controlled 都可以