Question

【题目】Tom is so independent that he never asks his parents' opinion _________ he wants their support.

A. sinceB. once

C. unlessD. after

Answer 1

【答案】C

【解析】

考查连词辨析。句意：汤姆是如此独立，以至于他从来不征求父母的意见，除非他想得到他们的支持。since因为；once一旦；unless除非；after在……之后，根据题意，故选C。