帮忙解决两道英语题1._______,he is ready to accept suggestions from di

帮忙解决两道英语题
1._______,he is ready to accept suggestions from different sources.
A.Instead of his contributions B.For all his notable contributions
C.His making notable contributions D.However his notable contributions
2.I was to have made a sppech if_____.
A.I was not called away B.nobody would have called me away
C.I had not been called away D.noboday called me away
请解释下原因,感激不尽