_______ the fact that his original experiments had failed, Pro. White stuck to his research.

The picture on the wall looks better .

Food supplies in the earthquake area ________. We must act immediately before there’s none left.

The rise in wood fuel use has _____ the disappearance of forest and the loss of habitats for pandas.

We’ll have a hiking trip, but when shall we meet—Let’s make it ___ half past eight ___ the morning ofJune 1.