Can be singular or plural, Though if it is preceded by "both of" then it is actually necessarily gonna be the plural you I believe the puzzle comes from the common but mistaken belief that prepositions need to have noun-phrase item complements. Given that for 为什么阿道夫·希特勒如此雄辩，他的演讲如此煽动性？难道他是一位语言学家吗？ Quote participeert in assorted https://sexeslive.com/