The disease, ________, could spread very fast.
-Sunday is a public holiday, ___ children should get close to nature.-But most of them have several lessons to attend.
I have finished a large part of the novel written by Dickens, the rest of which ___ very difficult.
___ with the increasing unemployment, many people went on strike in most of the European countries.
-Mr. Harry, we want to hear what you think about the reform being carried out in our school.-OK, I ___ to that.
I have always been honest and straightforward, and it doesn’t matter ___ I’m talking to.