He kept yawning in class this morning. That is _____ he stayed up late doing his homework last night.
The workers _____busily when the boss came to look for something she ______in the office. A had worked, had leftB were working ; had left C working ; had left D had worked; left
I’m afraid it will be two months______. A when I come back B when I’ll come back C before I come back D before I’ll come back
---- How is the old man now? ---- Sorry, he ______ though they did all they could to save him.
---- Do you live in this city? ---- No, we ______ it for holidays.
Nothing _______ clear about the meeting.