13. ----Angelia looks blue today.
----Yes, but she won’t say _____ bothers her.
| A．why is it that | B．that is why | C．it is what | D．what it is that |
Between the two parts of the concert is an interval, the audience can buy ice – cream.
| A．when | B．where | C．that | D．which |
I will never understand how it that you were an hour late on such a short journey.
| A．came about | B．came across | C．came out | D．came up with |
About 270 million people in rural areas in China have no to safe drinking water.
| A．entrance | B．access | C．solutions | D．sources |
I sooner but I didn’t know that they were waiting for me.
| A．had come | B．was coming | C．would come | D．would have come |
is known to us all is that the 2012 Olympic Games will take place in London.
| A．As | B．What | C．That | D．It |