Fill in the Blank
I ________ (see) that movie before.
have seen
Which country has the largest land area in the world?
Russia
We ________ (go) to Italy last summer.
went
In which year did WW2 begin?
1939
She ________ (work) on the project for three hours.
has been working
What element is abbreviated as Fe?
iron
I ________ (not / finish) my homework yet.
haven't finished
What class is a platypus?
Mammalia = mammal
They ________ (live) in Zurich since 2020.
have lived / have been living
2(x + y)= 14
3x - y= 13
x= 5, y= 2