1. What was that notice .......... ? A. at that you were looking B. you were looking at C. you were looking at it D. which you were looking 2. Little Woman, ......... in 1868, is my favourite book, A. is a novel published B. a novel published C. a novel was published D. was a novel published 3. I have three brothers, ...... are businessmen. A. all of which B. all of those C. all of whom D. all of who 4. The chemistry book ........ was a little expensive. A. that I bought it B. I bought that C. what I bought D. I bought 5. " Why do you get up at 4.00 am ? " "Because it's the only time ....... without being interrupted A. when I can work on my book B. when I can work on my book at C. when I can work on my book then D. at when I can work on my book Giải thích đầy đủ.