The new buyer identified a dozen new sources for the material, ___________ proved to be reliable.
the sentence , so he asked the teacher to explain it again.
——The weather is too cold ____ March this year. ——It was still ____ when I came here years ago.
The “Warning” reads: “Under no circumstances _____ be kept near fire!”
Had the boy worked harder, he ______ the exam.
________ is surprising to us is that Tom, for _______ English was once boring, can speak English fluently as though he were a native speaker.