To + inf or -ing?

1. I’m sorry .......... your call.

• to miss

• 1. missing

We’re sorry for .......... so late.

• arrive

• arriving

She’s afraid ............... at night.

• to walk

• walking

He’s afraid of .............. new people.

• to meet

• meeting

1. Do you have the money .......... a new phone?

• 1. to buy

• buying

1. I don’t know what .......... next.

• 1. to do

• doing

1. It’s a waste of time .......... with them.

• 1. to argue

• 1. arguing

1. It’s no use .......... about it now.

• 1. to worry

• 1. worrying

1. There’s no point in .......... the exam without studying.

• 1. to take

• 1. taking

1. He had difficulty .......... the instructions.

• 1. to understand

• 1. understanding