I failed in the job interview and only then _____ the importance of learning English well.
| A．I realized | B．I had realized | C．did I realize | D．had I realized |
_____we’ll go camping tomorrow depends on the weather.
| A．If | B．Whether | C．That | D．Where |
Does _______ matter if he can't finish the job on time?
| A．this | B．that | C．he | D．it |
I hate _____when people talk with their mouths full.
| A．it | B．that | C．this | D．them |
It worried her a bit ______her hair was turning grey.
| A．while | B．if | C．that | D．for |
_____ is a fact that English is being accepted as an international language.
| A．There | B．This | C．That | D．It |