We must act now because time is _______.—Yes. Let’s start.
Though Mandela﹙曼德拉﹚____27 years in prison﹙监狱﹚, he thought it meaningful.
This is Jim Green. You can call him ______.
Miss Liu, do you have any ideas about Jiuzhaigou _______ we will play together this summer holidays?
Bruce and his father are talking ________ the telephone.[ ]