在进行如此大额投资前，你应该三思。

You should ___think ___twice before making such a large investment.

那次经历之后，我在相信在线评论前会三思。

After that experience, I’ll ___think ___twice before trusting online reviews.

她建议他在辞去稳定工作前要三思。

She advised him to ___think ___twice about quitting his stable job.