It's harder to fight off ................ illnesses when you're stressed and tired.

The vaccince only protects you against certain strains of ................ disease.

................ antibiotic does not fight infections caused by viruses.

endangered / the / an / animal / is / species / no / panda / longer / .

............... back hurts a lot.

[same or different] 1.Too much time in front of a computer can strain the eyes. 2.Too much time in front of the computer can strain the eyes.

If you try to read in the dark, you'll strain ................ eyes.

................ very young and elderly are the most at risk.

Most people in this country have ................ healthcare insurance.

his / for / my / really / brother / a / cat / wants / birthday / .

You should go to the doctor every year for ................ check-up.

home-cooked / best / a / the / is / medicine / meal / .