Яким стимулом є вигляд чи запах зебри для голодного лева

put the verbs into the correct tense :

1. Columbus (discover) America more than 5 hundred years ago.

2.I came up to the window.It (stop) raining and the sun (shine) brightly in the sky.

3. Since when you (know) him?

4.Look through the window. It (rain).

5. They (not speak) to each other for over three weeks.