II.根據漢語提示完成句子(共5小題; 每空1分,滿分10分)

76. 在理論上這些課是可選的，而實際上他們是必修的。

In ______, these classes are optional, but in practice they are _______.

77. 住在海邊的人也很容易對貝殼熟視無睹。

A person who lives near the ocean could easily _______ shells for _______.

78. 而離職的主管則得到大筆的退職金。

Departing directors, on the other hand, get big _______ _______.

79. 除了身體上的收益，有氧運動還有情感上的益處。

_______ _______ to the physical benefits, aerobic exercise has emotional benefits.

80. 一個住在周圍都是松樹地方的人有可能認為松針沒什么了不起。

A person who lives in an area surrounded by pine forests may_______ _______ of pine needles.