. As there is less and less coal and oil, scientists are exploring new ways of making use of ______ energy, such as sunlight, wind and water for power and fuel.

Millie, could you give me some advice I don’t know_______.- Why don’t you wear this red shirt

Tom and Paul usually watch TV ______weekends.

Recently, to maintain national balance, theChinese government has _____ a policy of encouraging college graduates to takepositions in rural areas.

A lot of changes ______ in my hometown already