【正文】
( )15. Which of these do you think is ____ useful invention? more second more second most ( )16.- When did you ______the book to the library? - Yesterday afternoon. A. borrow B. lend C. give D. return ( )17. English teachers often encourage the students _______ English aloud. A. read B. reading C. to read D. readed ( )18.- ______he ever ______abroad ? - No, never. A. Did, go B. Is, been C. Has, been D. Has, gone ( )19. Can you ______who has lost the watch? A. look for B. look up C. find D. find out ( )20. He is too old to ______the name of that book. A. pick up B. think of C. e up D. fill in Ⅱ 、