(Those of us) who work in chemical (laboratories) should have (their) lungs (checked) quite regularly.

admin2007-10-13  63

问题 (Those of us) who work in chemical (laboratories) should have (their) lungs (checked) quite regularly.

选项 A、Those of us
B、laboratories
C、their
D、checked

答案C

解析 应改为our,代指前面的those of us。
转载请注明原文地址:https://kaotiyun.com/show/rtPO777K
0

最新回复(0)