Indonesian: Are these translation involving questions and "I don't know..." sentences correct? 1a. Who came yesterday? = Siapa yang datang kemarin? 1b. I don’t know who came yesterday. = Saya tidak tahu siapa yang datang kemarin. 2a. What did he buy last night? = Apa yang dia beli tadi malam? 2b. I don’t know what he bought last night. = Saya tidak tahu apa dia beli tadi malam. 3a. When did they watch the movie? = Kapan mereka menonton filmnya? 3b. I don’t know when they watched the movie. = Saya tidak tahu kapan mereka menonton filmnya. 4a. Where did Jake buy that book? = Di mana Jake membeli buku itu? 4b. I don’t know where Jake bought that book. = Saya tidak tahu di mana Jake membeli buku itu. 5a. Why did Jake take that book from her? = Mengapa Jake mengambil buku itu dari dia? 5b. I don’t know why Jake took that book from her. = Saya tidak tahu mengapa Jake mengambil buku itu dari dia.6a. How did David read this book? = Bagaimana David membaca buku ini? 6b. I don’t know how David read this book. = Saya tidak tahu bagaimana David membaca buku ini. 7a. Has Heather eaten this morning? = Apakah Heather sudah makan pagi ini? 7b. I don’t know whether Heather has eaten this morning. = Saya tidak tahu apakah Heather sudah makan pagi ini. 8a. Has Jeremy ever written a poem? = Apakah David pernah menulis syair? 8b. I don’t know whether Jeremy has ever written a poem. = Saya tidak tahu apakah Jeremy pernah menulis syair. 9a. How often does she buy books on Ebay? = Seberapa sering dia membeli buku-buku di situs Ebay? 9b. I don’t know how often she buys books on Ebay. = Saya tidak tahu seberapa sering dia membeli buku-buku di situs Ebay.10a. Whose coat did she lose? = Mantel siapa yang dia hilangan? 10b. I don’t know whose coat she lost. = Saya tidak tahu mantel siapa yang dia hilangan. (=kehilangan) 11a. What book did he bring? = Buku apa yang dia bawa? 11b. I don’t know what book he brought. = Saya tidak tahu buku apa yang dia bawa.