Question

____ red is a symbol of warmth, it can sometimes make people feel uneasy or even frightened.

A．As

B．Since

C．If

D．While

Answer 1

D

考查连词。句子前后表让步关系，排除B,C；as引导让步状语从句时，句子要进行倒装，而原句是正常语序，排除A；所以选D，While虽然，尽管，表让步。