In which play is _____ your brother appear?

____ you believe him when he said he made it to Eason’s concert! He doesn’t like pop music at all.

The price of pork has not been kept under control asexpected, and _____ is more surprising is that the price has risen by 15% justin the past few months．

Look! There’s __________ice on the lake.

In my opinion, more attention should be ______ the environment, which is of great importance.