再新东方蓝皮书一题

lynntess

P175，7

Tenor George Shirley sang more that 20 leading roles at the Metropolitan Opera since having his debut there as Fernando in Cosifan mile on October 24,1961

(C) has sung more than 20 leading roles at the Metropolitan Opera since

(D) has sung more than 20 leading roles at the Metropolitan Opera after

答案是C，可是since 后不是应该加句子吗，在这里对吗？我选的是D。。。请指教～

足球幽灵

since 还可以作介词，表示“自。。。以后”，介词+短语，所以此题since用法正确。