题目内容
The teacher, with 18 girls and 22 boys of her class, ____ doing experiments in the lab when the earthquake struck.
A．was B．were C．had been D．has been
A
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The teacher, with 18 girls and 22 boys of her class, ____ doing experiments in the lab when the earthquake struck.
A．was B．were C．had been D．has been
A
阅读快车系列答案