Let's begin our meeting_____everyone is here.为什么只填since不能填wh

Let's begin our meeting_____everyone is here.为什么只填since不能填wh Since everyone____________(be) here, let's begin our meeting ____everone is here,let's begin our meeting. ( ) Let,s begin our class Is ____ here now? ______everyone is here.Let's begin our class. _____everyone is here,Let's begin our party. __________ everone is here,let's begin our class. 1.______everybody is here ,Let's begin our lesson Let's begin our class _____ everybody is here Let’s _____ (begin ) our class.这里填什么? Since everyone ___(be) here,let's ___(begin) our discussion （ ） everyone is here ,let us begin our class.A .Since B .For