Use sentences 1–3 to complete the short conversations below.

Write one number (1–3) in each gap.

A: [ ]

B: Sorry, only cash is allowed.

A: What is the tallest building in the world?

B: [ ]

A: Can my friends come round?

B: [ ]

1. It's Burj Khalifa in Dubai.

2. Visitors are prohibited on our campus.

3. Can I pay by credit card?