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【題目】-- It’s dangerous to walk across the street carelessly.

【題目】 When the boy walks _______ the table ， he often knocks the things _______ it.

【題目】How can we (阻止) air pollution?

【題目】We must be strict __________ourselves __________ our work.

【題目】At the meeting，Mr. Wang began with a short (介紹).

【題目】If people know more about pollution(污染), _______ they will do something ______.

【題目】People shouldn’t keep ________ animals.

【題目】 I know Maths is not _______ Chinese.

【題目】She doesn't like b__________________.(花椰菜)

【題目】Sam spends _______time _______CDs than David.