A: How is Linda getting along with her studies?
B: Very well. Especiall she has a good command of history.
A: Really? I always think history is difficult for children.
B: Yeah. But Linda likes reading, you know, she has read almost all the history books she could lay her hands on.
A: No wonder.
lay (one's) hands on
exp. To touch or grasp someone, often with the threat of violence. （以暴力相威脅去觸摸或抓住某人）
e.g. Oh, once I lay my hands on you, you'll take back what you said!
e.g. If you lay your hands on me like that again, I'll kill you.
e.g. If the police can lay hands on the robber, they will put him in prison.
exp. To acquire something, usually a physical object. （得到）
e.g. I need to go to the library and lay my hands on this book for my research paper.
e.g. It took years, but I've finally laid my hands on this very rare Beatles recording!
I thought the book was on my shelves but I can't just lay hands on it.
They plundered the village of everything they could lay hands on.
have a good command of：對……熟練掌握，精通……
e.g. We work hard at English so as to have a good command of it .
e.g. If you don't have a good command of the course material, then you won't do well on the exam.
How is somebody getting along with somehting? （某人做某事進展如何？某人做某事怎樣呢？）
e.g. How are you getting along with your business?