China needs to strike a balance between maintaining a ______ fast and stable development and economic structural adjustment. 

— Lovely weather, isn’t it?— Yes, a bit hot, ______ ．

—Did you have any trouble in getting here ?— No .       I would have telephoned you .

These problems are different from each other, so they should be dealt with         .

Polar bears live      on sea ice，which they use as a platform for hunting seals