_____speak more English in class?
---I find the more we study, the more difficulty we have ________ out Maths problems.---Oh, I agree with you. Maths is more and more difficult.
---What a mess(杂乱)! Tony, you should ___________ your things to keep the room clean.---OK, Mum! I’ll do it at once.
---Where was your sister at this time yesterday evening ? ---She was writing an e-mail ______ I was watching TV at home.
--- Would you like black or white coffee? --- Well, I ______ coffee ______ milk.
The 16th ______ Games will be held in Guangzhou, we’ll watch the ______ opening ceremony on TV on November 12th.