Question

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5. He waited while the new equipment ... in the lab.

had been tested

was being tested

has been tested

was testing

Answer 1

He waited while the new equipment was being tested in the lab.

Answer 2

Відповідь:

He waited while the new equipment was being tested in the lab.

Пояснення:

Речення подано в минулому часі, тому нам потрібно використовувати минулий прогресивний час. Минулий прогресивний час утворюється за допомогою was/ were + present participle. Тому нам потрібно використовувати was being tested