请教几道高中英语单选题
(1)----Brad was Jane's brother. ----____he reminded me so much of Jane!
A.No doubtB.Above all C. No wonderD.Of course
提问:为什么选C不选A?No doubt 与No wonder 有何区别?
(2)Anyway,that evening,____I'll tell you more about later,I ended up staying at Rachel's house.
A.when B.where C.whatD.which
提问:为什么选D不选A?
(3)My mind wasn't on what he was saying so I'm afraid I____half of it.
A.was missing B.had missed C.will missD.missed
提问:为什么选D而不选B?
(4)To keep healthy,Professor Johnson____cycling as a regular form of exercise after he retired.
A.took upB.caught onC.carried out D.made for
提问:为什么选A? 能不能顺便解释一下其他词组的意思?Thank you