Easy
1 point
ID: #21416
Question
Water boils ____ you heat it to 100 centigrade.
Options
1
unless
Correct Answer
2
until
Correct Answer
3
if
Correct Answer
4
Although
Correct Answer
Explanation
This is a zero conditional sentence expressing a general truth or scientific fact. 'If' introduces the condition required for the result (boiling) to happen. 'Unless' would mean the opposite.