—You look so tired. What’s the matter?
—I was so busy that I didn’t go to bed          12 o’clock last night.

---Jack，you look tired today. What's wrong?

   --- I was _______ busy _______ I didn't go to bed until midnight yesterday.

A. too；to        B. so；that         C. enough；to；   D. such； that

—Amanda, you look tired today. What’s wrong?
—I worked______ late ______ I didn’t go to bed until midnight yesterday.

-- Did you go to bed early last night?

--- No. I watched a            movie, so I didn't go to bed until 11 o’clock.

A. 3-hours          B. 3-hours’     C. 3-hour’s     D. 3-hour

I didn’t go to bed ______ I finished all the homework last night．

A．when            B．after             C．while             D．until