What are you doing, Jack?―I’m looking for some information about famous people______can help me make a poster. .

Linda’s father hates waiting in long lines. I think he’s very _______.

He ________ to swim when he was five.

Hello, Betty! Where are you now?— I ________ on the Great Wall of China and talking to you.

In the dark street, there wasn’t a single person _____ she could ask for help. [ ]