—_______ of volunteers will be needed for 2014 International Horticulture Exposition in Qingdao.—Let's go and _______ them.
There is ________”h” and ________”u” in the word “hour”.
–Must I finish my homework tonight? -No, you______.
It’s difficult _____ your sound because the noise is too high.
- Could you please help me carry the box? - .
I’d like to join the school volunteer project, but I’m not sure ______.