those / us / smoke / have lungs / x-ray / regularl...

Câu hỏi: those / us / smoke / have lungs / x-ray / regularly.

A Those of us who smoke should have our lungs x-rayed regularly.

B Those of us smoke and have the lungs x-ray regularly.

C Those of us who smoke and have the lungs x-rayed regularly.

D Those of us smoke and so have our lungs x-ray regularly.