从下面方框中选出与下列各句中划线部分意思相同或相近、并能替换划线部分的选项。（共4小题，每小题1分；计4分）

Everyone can realize his dream if he works hard enough.
The lights in our classroom went out suddenly last night.
It’s a strict rule that you must keep quiet in the exam.
You may ask him yourself.