During our stay in London, the guide book ___ a great help. We all had a wonderful time.A. behaved B conducted C. served D. proved
25. After many years’ tough talks, Vietnam became the 150th member ________ the WTO last year.
24. In the reading room, we found her ______ at a desk, with her attention _______ on a book.
23. Tom was __________ to miss the school bus, because he got up too late.
22. ________ is no doubt ________ he will win the first prize.
II.单项填空(共15小题;每小题1分,满分15分) 21.The news came to us as _______ great surprise that he had turned __________ writer. A a; a B a; / C. /; a D. /; /