My doctor recommended that I _______ moreexercise.

_________，so he didn’t come to school last week.

There _____ be any difficulty about passing the road test since you have practised a lot in the driving school. [ ]

The bush fire ________ fierce heat and the villagersnearby had to flee.

often pointed out, knowledge isa two-edged weapon which can be used ______ for good or evil.