I’d like to trek ______ the jungle.

May I go and play with Dick this afternoon, Mum?— No, you can’t go out _____ your work is being done

Look! Here are ____________ .

It was not until dark _______ he found _______ he thought was the correct way to solve the problem.

Ningbo is no longer the city _____ it was ten years ago. How beautiful it has become![ ]