Progress so far has been very good.______，we are sure that the project will be completed on time.

As is known to all language learners, the newly learnt words will soon be forgotten unless ______ used in everyday communication.

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

— Do you think we’ll get somewhere in he future.— I believe it’s quite_____ that we’ll make a difference so long as we work harder.

The situation is very serious, even if the government tries to pretend ______.