1 Choose the best answer: to put
1. The firemen are outside. They(try)… out the fire for the last two hours.
2. Troy is a pilot. He(fly)… to many parts of the world.
3. The baby(sleep)… for more than 4 hours. I think I will wake her up.
4. Alex(go)… to Padre Island only once.
)
1 have been trying
2 flies
3 has been sleeping
4 goes