s.add(1).add(2).add(2);s.has(3)//false。
s.add(1).add(2).add(2);s.has(3)//false。
s.add(1).add(2).add(2).delete(2);s.has(2)//false。
s.add(1).add(2).add(2).delete(2);s.has(2)//false。
This research has attracted wide ________ coverage and has featured on BBC television‘s Tomorrow’s World.
This research has attracted wide ________ coverage and has featured on BBC television‘s Tomorrow’s World.
______has been regarded as China’s Valentine’s Day.
______has been regarded as China’s Valentine’s Day.
My birthday's coming. Let's (__) (has) a party
My birthday's coming. Let's (__) (has) a party
_____ has a new bin. It’s ______ bin. It belongs to ______ . It’s his.
_____ has a new bin. It’s ______ bin. It belongs to ______ . It’s his.
Venezuela, a country located in north of ( ), once has been one of the world's largest exporters of oil and has the world's largest ( ).
Venezuela, a country located in north of ( ), once has been one of the world's largest exporters of oil and has the world's largest ( ).
It’s hot today. The temperature________ to 35℃. A: has risen B: has been risen C: has been raised D: has raised
It’s hot today. The temperature________ to 35℃. A: has risen B: has been risen C: has been raised D: has raised
Empson’s writing has a _____ style.
Empson’s writing has a _____ style.
Each university or college has it’s .
Each university or college has it’s .