Which car is _______, the yellow one or the red one? —The red one, I think.

Don’t lose heart. It won’t be long ___________ you catch up with others.

Hello! Mrs. Smart! I want to talk _____ you _____ my daughter. [ ]

When ，____your father ____back? When he _________ back, please give me a ring.

This T-shirt is too _______ . Can you buy me a big one, Mum?