Choose the correct form of the verb. To or -ing? 1. He tried to avoid answering/answer my question. 2. My memory is getting worse. I keep forgetting/to forget things. 3. If you invest your money on the stock market, you risk to lose/losing it.

1)We went roler-skating las Saturday.

We didnt go  roler-skating las Saturday.

Did we go  roler-skating las Saturday?

2)Where your father worked five year ago?

3)Newton invented the telescope im 1668.

Newton didnt invent the telescope im 1668.

Did Newton invent the telescope im 1668?

4)There were a lot of tourists in our café yesterday.

There werent a lot of tourists in our café yesterday.

Were there a lot of tourists in our café yesterday?

5)I didnt go to the park yesterday, i stayed at home.

I went to the park yesterday, I didnt stay at home.

Did i go to the park yesterday?

6)In 1999 I didnt go to school, i went to kindergarten, I was only 6.