她想买那件裙子，但是太贵了。

She wanted to buy that dress, ___but it was too expensive.

除了玛丽，所有人都参加了会议。

Everyone ___but Mary attended the meeting.

我们别无选择，只能继续前进。

We have no option ___but to keep moving forward.

他本想参加派对，但头痛阻止了他。

He would have gone to the party, ___but for his headache.