请教几道基础英语试题

1.some people may have been daunted by the task beacause of the difficulties it brings, but I do not know of __.
(A)them doing so    (B) any having done so        ( C) their doing like that         (D)any doing that way
2.Suppose you tried to lift a 100-poud rock two feet you __more work than of you __it one feet.
(a) would...lifted       (b) did... lifted   (c)willdo...will lift     (d)woulddo...will

最近怎么没有人回复啊？

1.B
2.A

1.D
2.C这是我的答案