问题

The light in his office is still on. Do you know _______—To prepare for the material(材料) the meeting will need tomorrow, I think.

A:if he works hard
B:why he stays up so late
C:why is he so busy
D:when he will stop working;

正确答案是：

同类题型

－Wow! _______ beautiful the music is!－Yes. That’s my favorite.

This pair of shoes ______ hand, and it ______very comfortable.

Mom! May I have some cakes—Sorry, there’s ________ left in the box. I will go and buy some for you this afternoon.

s the driving test, Alice had a busymonth __________ driving the car

填入下面一段文字横线处的语句，最恰当的一句是（）太阳照耀大地，没有阳光人类不能存活。。维生素D对调整人体内钙和磷的含量至关重要，并且可以预防佝偻病等疾病。如果没有直接供给，我们的身体就必须利用自身物质“制造” 维生素D．这些物质可以从鲑鱼和鸡蛋等食物，或者从我们的皮肤中以胆固醇新陈代谢衍生物的方式得到。而在这些物质有效地转变成维生素D的过程中起至关重要作用的恰恰是紫外线B。