下列短文中有十個空白，每個空白有四個選項。根據(jù)上下文要求選出最佳答案，并在答題紙上將相應(yīng)的字母涂黑。

　　When I was a child,I 1ived with my mother,my father having been away to work in the lown. I was then not   11   nine years old,lonely and expectant,   12   for things which I knew little about.I walked out alone one morning along the mountain tops   13   my home stood.The sun had not yet risen,and tlie air   14   rain of the night and the mountain grass was heavy _ 15   tiny drops of water. As I looked back,I could see the marks my feet     16     on the long grassy slope behind me. I walked till I came to a place     17     a little stream ran into the deep valley below. Here it passed between soft, _18     banks; at one place a large slice of earth had fallen away from the bank on the other side,and it had made a little island a few feet wide with water    19    all round it.lt was covered with a weed with yellow flowers and long waving grasses. I sat down on r.he bank    20     a short pine tree. All the plants on the island were dark with the heavy raindrops of the night,and the sun had not yet risen.

　　11. A. yet             B. however           C. but                 D. nevertheless

　　12. A. sending         B.longing            C. standing            D. making

　　13. A. in which        B. at which          C. from which          D. on whicl!

　　14. A. melt            B. felt              C. smelt               D. sensed

　　15. A.for              B.with               C.on                   D.upon

　　16. A. have made       B. has made          C. had made            D. having made

　　l7. A. where           B. that              C. which               D. what

　　18. A. worldly         B. hardening         C. worthy              D. earthen

　　19. A. clrifting       B. flowing           C. blowing             D. floating

　　20. A. at the top of   B. on the part of    C. at the foot of      D. on the ground of