1.Why not try your luck downtown ,Bob?That’s ___ best jobs are.

1.Why not try your luck downtown ,Bob?That’s ___ best jobs are.
A.where B.what C.when D.why
(A) 需要翻译一下
2.She’ll never forget her stay there _____ she found her son who had gone missing two years before.
A.that B.which C.where D.when
(D)
3.I was given three books on cooking ,the first ____I really enjoyed.
A.of that B.of which C.that D.which
(B)
4.Maria has no idea ____it will be her turn.
A.when B.what C.which D.if
(A) 需要翻译一下
5.The man _____ you referred to is fond of chatting online with ______ shares the same interest.
A./;whoever B.who;whomever C./;whomever D.who;no matter who
（A）需要翻译下
6._____is gone may be gone forever.
A.that B.what C.all D.anything
(B) 需要翻译
六道题选项给出了,希望解释原因