Question

Choose either the Present Simple, Present Progressive, Perfect or Past Simple: It (get) dark. Let's go home; I (write) the letter but I can't find a stamp; Can you see who (sit) in the park?

Answer 1

It gets dark. Let's go home.
I have wrote a letter but I can't find a stamp.
Can you see who sits in the park?

Answer 2

It is getting dark.
I have written the letter...
...who is sitting