Have you read the book ____ I lent to you

It’s easy ______ a banana milk shake. Let me help you.

________had he received the telegram ______ he started off at once[ ]

填入下面一段文字横线处的关联词，最恰当的一项是（ ）青年人富有理想和抱负，憧憬着美好的未来，这是青年的特点，也是优点。 ① 需懂得，个人的抱负不可能孤立地实现， ② 把它同时代和人民的要求紧密结合起来，用自己的知识和本领为祖国为人民服务， ③ 使自身价值得到充分实现。 ④ 脱离时代，脱离人民，必将一事无成。

He is never satisfied with what he has got. The grass is always greener on the other side of the ____.