Polar bears live mostly on __________ sea ice, which they use as __________ platform for hunting seals.
There was plenty of time . She ____ .
Look! Xiao Wang is too sleepy to work . He ____ up watching TV .
The streets are all dry . It ____ during the night .
Water ____ be changed into vapour but it ____ be heated to its boiling point .
____ you like something to drink now ?