_______(safe)needs to be improved on the railways in that country
safety
暂无解析
Manyothernewtechniquesarenowavailablethatenablemoreresearch___(do)inthetesttubetoseeifchemicalsproduceharmfulbiologicaleffects.
Out sleep influences our mood. our mood, ________,affects our performance
The theory of black holes in space__ (accept) by many serious scientists and astronomers.
Apersonisluckyifhiscareer________withhisinterestandhobby
Agoodworkerinakeyspotcould,hekeptupproduction,takeallthecoffeebreakshewanted,andthebosseswouldverylikelylooktheotherway.
