Answer:
Explanation:
if you look at number one in the first section . Everyone in the lab the experiment on page 30. Who was in the lab? everyone was. you would circle everyone and underline in the lab. What was on page 30? the experiment was. if you ask these questions to yourself it should clarify it... hope this helps.
Trees and plants release oxygen. As the main source of oxygen for us, most animals would likely die, including us.
Automatic doors. How else would we think of them?
The answer is C, Life is short; laugh and be merry. Have a nice day. :)