从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
6.As soon as I entered Evan's company I saw a board____"____to Evans".
A reads;Welcomed B.written;to Welcome C.reading;Welcome D.printed;Welcome
7. Apples are usually sold by______weight and eggs are sometimes sold by _______dozen.
A.the;the B./;a C. /;the D. the;a
