【题目】---Let's play baseball. ---_______ .

【题目】_______ it was dangerous, they decided to go on climbing the mountain.

【题目】Will your mother start to do the housework _______ she gets home?

【题目】 Thank you for ______ me.

【题目】I don't have much ________ time on school days.

【题目】He always tries (help) the people who are in trouble.

【题目】: My name is Mary Smith. _______ is my family name.

【题目】The Great Wall was used for preventing (enemy).