【2012黑龙江齐齐哈尔】The math problem is so hard. I really don’t know_____. A. how to do it B. how to do C. what to do it
–I argued with my best friend. What should I do? --If I ________ you, I would say sorry to her.
Don’t put off today’s work till tomorrow. I mean, today’s work _____today.
— Why not go and play football outside? — ______________.
I’m going to write articles and _______ them to magazines and newspapers.
We all know that dinosaurs lived on the Earth more than ______ years ago.