Read it through once

"Of course I couldn't say anything after that, and as it really is a splendid opportunity, I made the bargain, and we began. I took four lessons, and then I stuck fast in a grammatical bog. The Professor was very patient with me, but it must have been torment to him, and now and then he'd look at me with such an expression of mild despair that it was a toss-up with me whether to laugh or cry. I tried both ways; and when it came to a sniff of utter mortification and woe, he just threw the grammar on to the floor, and marched out of the room. I felt myself disgraced and deserted forever, but didn't blame him a particle, and was scrambling my papers together, meaning to rush upstairs and shake myself hard, when in he came, as brisk and beaming as if I'd covered myself with glory.