Ответ:
2) The cake was for Robbie's birthday.
The cake wasn't for Robbie's birthday.
Was the cake for Robbie's birthday? - Yes it was. / No, it wasn't.
3) Lulu was at the zoo last night.
Lulu wasn't at the zoo last night.
Was Lulu at the zoo last night? - Yes, she was. / No, she wasn't.
4) Mum and Dad were at home last night.
Mum and dad weren't at home last night.
Were mum and dad at home last night? - Yes, they were. / No, they weren't.
5) Chuckles was in Larry's room this morning.
Chuckles wasn't in Larry's room this morning.
Was Chuckles in Larry's room this morning? - Yes, it was. / No, it wasn't.
6) Larry was in the garden an hour ago.
Larry wasn't in the garden an hour ago.
Was Larry in the garden an hour ago? Yes, he was. / No, he wasn't.