Test

Hello, here's some questions of a test I've been going through. Though I passed it they didn't show me any right answers or explanations. Could you answer and explain your choice? Thank you.

1)My Mother said that I............her necklace, but I borrowed my sister's instead.

used

could wear

can wear

could ware

can take

2)The police asked me............anything?

if I had been seeing

if I had seen

I was seeing

if I have seen

I saw

3)I wish that I............all those sweets before dinner. I don't feel hungry now.

couldn't eat

haven't eaten

would not eat

didn't eat

hadn't eaten

4)............ rain, the Queen's garden party will be held inside Buckingham Palace.

if it

in the event of

in the case of

in place of

in time of