No matter how, it is not necessarily lifeless

Find ways to praise your children often，________ you’ll find they will open their hearts to you.(2011·山东)

After that terrible disaster, the officer had no choice but to _________ calm to deal with different problems.

Such a chance, once ________， might never come again[ ]

I’ll take part in 2014 CCTV Star of Outlook English Talent Competition next week.—_______. We will be with you!