It was ____ the old worker came that we ____ the experiment.
A. until; didn’t begin B. not until; began
C. until; began D. not until; didn’t begin
It was ____ the old worker came that we ____ the experiment.
A. until; didn’t begin B. not until; began
C. until; began D. not until; didn’t begin
B
本题句式结构为强调句型。强调until引导的时间状语从句,要把not放于until之前。