一Kurt stayedup for three days preparing for the exam and finally fell ill．一So．I dare say if you overworked for several days in arow.

30With little knowledge about the area he succeeded ______ many researchers failed

We should consider the students’ request that the school library_______ more books on popular science.

下列各句中，表达得体的一句是（ ）

I find our teacher is rather strict ___________us.—-Actually, my boy, your future boss will be cruel_________ you.