Verb + -ing or to ...?

Amy had a lot to do, so I offered _____ her.

• to help

• helping

I'm surprised that you are here. I didn't expect _____ you.

• to see

• seeing

Kate has a lot of books. She enjoys _____.

• to read

• reading

Don't forget _____ us a postcard when you're on holiday.

• to send

• sending

I'm not going out until it stops _____.

• to rain

• raining

The weather was nice, so I suggested _____ for a walk by the river.

• to go

• going

Where's Ben? He promised _____ here on time.

• to be

• being

I'm not in a hurry. I don't mind _____.

• to wait

• waiting

I'm trying _____. Please be quiet.

• to work

• working

That shirt looks fine. It doesn't need _____.

• to iron

• ironing