1. (-) He wasn't planting trees in the garden at 4p.m yesterday.

(?) Was he planting trees in the garden at 4p.m yesterday?

2. (-) They weren't working when she came yesterday.

(?) Were they working when she came yesterday?

3. (-) She wasn't painting a picture while her mother was making a cake.

(?) Was she painting a picture while her mother was making a cake?

4. (-) Anne wasn't riding her bike to school when Peter saw her yesterday.

(?) Was Anne riding her bike to school when Peter saw her yesterday?

5. (-) He wasn't typing a letter when his boss went into the room.

(?) Was he typing a letter when his boss went into the room?

6.were you doing

7.were you going

8.weren't going

9.wasn't doing

10.read/was playing

Ex 2:

1.(-)He wasn't painting the trees in the garden at 4pm yesterday.

   (?)Was he painting the trees in the garden at 4pm yesterday?

2.(-)They weren't working when she came yesterday.

   (?)Were they working when she came yesterday?

3.(-)She wasn't painting a picture while her mother was making a cake.

   (?)Was she painting a picture while her mother was making a cake?

4.(-)Anne wasn't riding her bike to school when Peter saw her yesterday.

   (?)Was Anne riding her bike to school when Peter saw her yesterday?

5.(-)He wasn't typing a letter when his boss went into the room.

   (?)Was he typing a letter when his boss went into the room?

Ex 3:

1.saw

2.were you doing

3.didn't visit