—Guess what？I came first in that contest.—Great！You ________ a lot during the past two weeks.

— Is it good to look up every new word when I come across it in reading?—No，you _____，because you are likely to guess the meaning from the context,

—Would you like to watch the 2014 Nanjing Youth Olympic Games this summer holiday?—I’d love to. I believe it ________ be fun.

—I think the man over there must be Bob. -- It_______ be him. He has______ to Australia. 

—I’m just going to finish the work off first.—Go on if you _______.