He kept looking at her, wondering whether he _____ her somewhere.

(   ) 29. In such dry weather, the flowers will have to be watered if they _________.

(   ) 26. I have been studying computer for several years and I still __________.

(   ) 17. In those days, whenever I had difficulties, I _______Mr Shen for help.

(   ) 12. He needs one more stamp before his collection __________.

(   ) 9. She never goes home until all her newspapers ________ out.

35. — Have you finished your essay?   
— Half       when you come back. 

30. —I _________ his telephone number.
—I have his number, but I _________ to bring my phone book.”

25. Welcome to the Historical Museum, everyone! This stone knife _______ in South Africa and experts can’t be exactly sure about its use.

His wife, to whom he _____ for 20 years, died of cancer last Thursday.