His busy work （占用）most of his time，so he couldn't even afford a holiday．
Instead of （放弃），Stephen Hawking worked even harder to realize his dream．
Their situations （与…相似）ours，but not exactly the same．
Everyone can （产生影响）to the environmental protection in their daily life．
There are plenty of sports you can do in bad weather， （例如），you can play basketball indoors．