You could work out the problem easily now if you ______ absent from the physics class last Friday.
5. From this story, you can have some idea ______ can be used in reality.
4. We believe ______ you have been devoted to ______ naturally of great necessity.
3. ______, I can spare no time for it now. I’ll have to finish my homework first.
2. Can you explain ______ that the medicine has for my illness?
I. 单项选择:(共50题;满分50分;每小题1分)从A、B、C、D四个选项中,选出可以填入空白处的最佳答案,并在答题卡上将该项涂黑。1. --- I serve three meals every day and do almost everything for him, but he still lets me down.--- I’m afraid that’s ______ you are mistaken.A.how B. where C. what D. in which