高一英语选择1.I ______________hard since 8 o'clock this morning,so

高一英语选择
1.I ______________hard since 8 o'clock this morning,so I feel very tired now
A.had worked B.worked C.have been working
2._______________I like reading most of the writer's books.I don't agree with many of his opinions
A.when B.as C.while D.since