1/
(-) Children didn't plant more trees.
(?) Did children plant more trees?
2/
(-) Tom wasn't a member of the Youth Club.
(?) Was Tom a member of the Youth Club?
3/
(-) The school wasn't closed despite the snow.
(?) Was the school closed due to the snow?
4/
(-) The organisation didn't provide shelter for children.
(?) Did the organisation provide shelter for children?
5/
(-) They weren't at school this morning.
(?) Were they at school this morning?
6/
(-) Tom didn't go to the hospital...ago
(?) Did Tom go to the hospital...ago?
7/
(-) The sidewalks weren't wet after the rain.
(?) Were the sidewalks wet after the rain?
8/
(-) I didn't work as a volunteer three years ago.
(?) Did you start to work as a volunteer three years ago?
9/
(-) They weren't in the library an hour ago.
(?) Were they in the library an hour ago?
10/
(-) Tom and his friends didn't go to orphanages to learn English yesterday.
(?) Did Tom and his friends go to orphanages to learn English yesterday?
