gerund vs infinitive (fce 2)

I can't help ____ (laugh) when he starts singing. He's terrible!

When I suggested ___ (go) skiing last week, everyone was really excited.

The man asked me how ____ (get) to the airport.

The problem is, studying means ____ (be) self-disciplined and that can be difficult sometimes.

I really ought to start ___ (go) to the library more.

I can't imagine Peter __ (go) by bike.

I kept _____ (ask) my parents for a dog and finally they said yes!

We didn't deserve _____ (lose) the match, we played really well!

He agreed __ (buy) a new car.

I have _____ (remember) to go to the post office. I need to mail this parcel!

This question is easy ___ (answer).

She doesn't mind ____ (work) the nightshift.

I look forward to _____ (see) you at the weekend.