How many students are there in the classroom—_____. I don’t know where they have gone.

下列括号内的缩句，与原句意思基本想符的一项是（ ）

Canada is one of the safest and most welcoming countries you will _____ visit [ ]

Next weekend we will play ____ Class 2.

The number of guests invited to the party______ fifty, but a number of them______ absent.