Sorry, I overslept. I forgot to set the alarm.–Your clock ________. Perhaps you should buy a new one.

下列各句中没有语病的一句是

He began to take political science __________ only when he left school.

The light in his office is still on. Do you know —To work on a very important project.

pping into the room this morning, I wasastonished to find the floor covered with _______looked like tinyinsects.