12. Необходимо выбрать правильную форму глагола "drive" в Past Perfect Continuous.
Past Perfect Continuous образуется с помощью had been + V-ing.
Следовательно, предложение будет выглядеть так: He was tired. He had been driving his car for 7 hours.
Ответ: He was tired. He had been driving his car for 7 hours.