Match the sentences according to the function of the words in bold:

Function:

1.Highlight key points or critical details.

2.Express information regarding location.

3.Express information regarding time.

Sentences:

A.You must not enter the forest. I'm being serious, you shouldn't enter it under any circumstance, because it is dangerous, John.

B.It is a bit too early for us to have breakfast at the office, is it not?

C.I didn't think he would be able to fit in there. The cave entrance is too narrow.