Itisnotdecided________theconferencewillbeheld.
C
A 什么 B 哪一个 C 什么时候 D (无词义)
Linguistscanconcentrateonalltheaspectsoflanguageatonce.
Youngerchildrenarecurious________howthingswork，andmanyofthemwanttotakeaparteverythingwithintheirreach.
We________goouttorestaurants,butmostlyweeatathome.
―________ fine day it is today!
It was a small place then compared to _______ it is now.