Exercise 4.
Put the verbs in brackets in the correct verb tense.
1.
Be careful! The teacher (look).
at you.
2.
The boy (learn)
for three years, but he can't understand this letter.
3.
How long (you/know)_
Paul?
- I (know).
him for five years.
4. (she/feed)
the cat yet?
5.
We (not see). ...
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