If water heated to 100 degrees Celsius at standard atmospheric pressure, it into steam.
Choose the correct pair of verb forms to complete this conditional sentence.

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A is / turns
B will be / turns
C was / would turn
D is / will turn

Show answer and explanation

Answer: A. is / turns

Correct Answer: a) is / turns
Explanation: This is a zero conditional sentence used to express scientific facts or universal truths. Both the condition clause and the result clause must remain in the simple present tense.

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If water ________ heated to 100 degrees Celsius at standard atmospheric pressure, it ________ into steam. Choose the correct pair of verb forms to complete this conditional sentence.

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If water heated to 100 degrees Celsius at standard atmospheric pressure, it into steam.
Choose the correct pair of verb forms to complete this conditional sentence.