He commanded that the students ______the classroom before he returned.

(2009福建泉州毕业模拟) --Where have you been? --I        in the heavy traffic. Otherwise I        here earlier.

_____  I passed the interview! ___  Good luck to you. next time!

— We did not see him at the lecture yesterday． — You _______ him, since I went to an international conference with him．

 It is required in our school that lights in students’ rooms ______ off by 11o’clock.