preposition 填充and 請解釋它的用法

1. on/off (穿上 / 脫下)
2. across (橫過)
5. of (在於)
6. in (躺睡於)
7. at (指向)
8. off (包紮)
9. in (身體特定部位的)
10.at (在..地方)
11.for...with (偕同....散步去)
13.on (靠...生活;以...為食)
14.of (好心的;樂於助人的)
15.for (在(指定時間))
16.on (傷口;刻痕)

1.Mary is putting ___on/off_her blouse.(穿上 / 脫下)
2.I am walking__on__the zebra-crossing.
5.Tody is the second day__of__March.
6.My grandma is__on__bed now.
7The arrow is pointing__to__the south.
8.Please tie__with__the parcels.
9.I have got pain__on__my head.
10.Our class camped___to_Cheung Chau last weekend.
11.Did you go_to___a walk_with___your dog yesterday?
13.People live__with__food and water.
14.It is good___for_you to help us.
15.Did she do the wash-up__in__an hour?
16.The boy has a bad cutwith___his finger.

2007-09-22 18:30:57 補充：
16.on