【正文】
英語 必修 1(人教版 ) 第四學(xué)時 Grammar 一、單項填空 1. After Jack had sent some e mails, he________working on his project. A. had started B. has started C. started D. starts 答案: C 2. The book, the cover ________is broken, is not mine. A. of it B. for C. whose D. of which 答案: D 3. This is the last time ________ I shall give you a lesson. A. when B. that C. which D. in which 答案: B 4. His glasses, ________he was like a blind man, fell to the ground and broke. A. with which B. which C. through which D. without which 答案: D 5. He is my son, ___