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Which of the following sentences is the passive voice of the following active sentence?

Agnes was heating the test-tubes while Aria was mixing the chemicals when the explosion occurred.

Choose one answer.

a. The test-tubes were being heated by Agnes and the chemicals were being mixed by Aria when the explosion occurred.

b. The test-tubes were heating by Agnes and the chemicals were mixing by Aria when the explosion occurred.

c. The test-tubes were being heated by Agnes and the chemicals were mixing by Aria when the explosion occurred.

d. The test-tubes were heated by Agnes and the chemicals were mixed by Aria when the explosion occurred.

is A the correct answer?
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Hi,
Which of the following sentences is the passive voice of the following active sentence?

Agnes was heating the test-tubes while Aria was mixing the chemicals when the explosion occurred.

Choose one answer.

a. The test-tubes were being heated by Agnes and the chemicals were being mixed by Aria when the explosion occurred. YES. ( But it says 'and' istead of 'while'.)

b. The test-tubes were heating by Agnes and the chemicals were mixing by Aria when the explosion occurred.NO

c. The test-tubes were being heated by Agnes and the chemicals were mixing by Aria when the explosion occurred. No

d. The test-tubes were heated by Agnes and the chemicals were mixed by Aria when the explosion occurred. No

is A the correct answer?

Clive
Comments  
Yes, A is the correct answer. D is also passive. But the construction was wrong without "being".