John, work hard ________ you willmake much progress.

It doesn’t matter to me which method you choose _____ you finish the job on time

It is really hard to find a nice place in this city we can have a picnic

I feel a bit nervous since this is the first time that I _______ to give a lecture to so large an audience till now.

ot in the shopping mall, because the air-conditioningsystem ______.