There are certain _________ when you must interrupt people who are in the middle of doing something.

[　　]

I couldn't ______. The line was busy.

[　　]

--How far apart do they live?

--________ I know, they live in the same neighbourhood.

[　　]

We all have a _______ to play in the protection of the environment.

[　　]

_________ the heavy snow, the highway has been closed up until further notice.

[　　]

The classroom is big enough ________, but we'll have to move if we have more students.

[　　]

Distance learning is being ________ in several countries to help children in remote rural schools obtain higher education.

[　　]

Your girlfriend felt sorry you didn't like the cake, _______ because she made it ________ for you.

[　　]

A．especially;especially

B．specially;especially

C．especially;specially

D．specially;specially

She ________ as soon as she arrived at the hotel and got ready for the next day's meeting.

[　　]

We couldn't cut the string because the ______ of the knife wasn't sharp enough.

[　　]