根据句意及所给汉语或首字母提示完成单词I have lost my interest in________(化学)．
Most of our________(知识)is at second hand．
He is an________(活跃的)member of the school’s stamp club．
He drove the car at full________(速度)through the town．
Did you ever d________who sent you the flowers？
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．
无现金支付已经改变了我们的生活方式，它真的很方便．
Cashless payment has the of our life and it is really convenient．