_____ of them knows Japanese, so I have to ask a third person for help.—You’d better ask Tom for help. He is good at Japanese.

We will celebrate the 90th birthday of the Chinese Communist Party ______ July 1st, 2011. [ ]

Finally, save your document before you ________ your computer.

Photography can be ______excellent hobby for kids.

Tom is very clever _____ maths and English. [ ]