Choose the correct -ing form for the verbs below to complete the sentences.

Choose the correct option.

[Making|Macking|Makeing] new friends can sometimes be difficult.

I saw Diana [siting|sitting|satting] quietly in the corner of the room.

What is [happenning|hapening|happening] to you?

We've been [picnicing|picniccing|picnicking] for two hours already.