20．I’m afraid taking a part-time job might ____ my time for study．

　　　 A．cut off 　　　　　　　 B．cut into　　　　　　　 C．cut down 　　　　　 D．cut away

19．_____you may be right, I can’t altogether agree．

　　　 A．As 　　　　　　　 B．While 　　　　　　　　 C．If 　　　　　　　　　　　 D．Since

18．In the reading room, we found her _______ at a desk, with her attention _______ on a book．

　　　 A．sitting; fixing 　　 B．to sit; fixed　 　　　 C．seating; fixing 　　 D．seated; fixed

17．-Could you offer me some paper ?

　　　 - Sorry, I haven’t ______ left myself．By the way I can go to the shop to buy ____ for you．

　　　 A．few; some　　　　　 B．little; many　　　　　 C．much; some　　　　 D．little; little

16．______several times , the young scientist still kept on making his experiments．

　　 A．To fail　　　　　　　　 B．Having failed　　　 C．Have failed　　　　　 D．To have failed

15．Jack, as well as his friends who _______ football games________ an exciting game in the Capital Stadium yesterday．

　　 A．likes; watches　　　 B．likes; watch　　　　 C．like; watched　　　 D．like; have watched

14．He __________ writing the paper now．He hadn’t written a single word when I left him ten minutes ago．

　　　 A．shouldn’t be　　　　 　　　　　　　　　　　　　　　 B．can’t have finished　

　　　 C．can’t be　　　　　　　 　　　　　　　　　　　　　　　　 D．mustn’t have finished

13．The old lady had one son and two daughters, _______ treated her well, ______ made her very sad．

　　　 A．no one of whom; as　　　　　　　　　　　　　　 B．neither of them; which

　　　 C．none of whom; which　　　　　　　　　　　　　 D．none of them; which