定语从句专项练习1. I mean the one _ was bought last night. A. which B. that C. it D. as2. Which is the bus _ took them here? A. which B. in which C. by which D. that3. This is the most beautiful city _ we have traveled. A. that B. which C. where D. to which4. They have three brothers, all of _ are doctors. A. which B. who C. whom D. them5. Here is a book _, as I have told you, will help improve your English. A. which B. of which C. as D. about which6. Th
