xìngkuī
幸亏

Meaning：luckily，fortunately

For example：

Wǒ chídào le，xìngkuī huìyì qǔxiāo le.
我迟到了，幸亏会议取消了。
I arrived late but luckily the meeting had been cancelled.

Xìngkuī lǎorén jíshí sòngdào yīyuàn,cái bèi qiǎngjiù guòlái.
幸亏老人及时送到医院，才被抢救过来.
Luckily the old man was sent to hospital at once and was already out of immediate danger.

Quick Test

( )警察及时赶到，才避免了灾难的发生.
A.因为
B.幸亏
C.然而