根据句子意思及汉语提示，写出所缺的单词。

1. Mary passed her examination because she studied very __________ (努力).

2. He told me his name but I've __________ (忘) it.

3. In the eighteenth century, more people came to America, __________ (主要地, 大部分地) Europeans.

4. Jim has lived in Australia for two years. He is used to __________ (驾驶) on the left.

5. I could see her __________ (透过) the window.