We won't go to the film unless they _(arrive) in the next 5 minutes.

We won't go to the film unless they arrive in the next 5 minutes.

Second Conditional.

my friend works at factory because he's a metallurgist. another friend is an advising seller of electronic equipment and clerical aids, therefore he works at office. his home is quite close to the office.

1.i see the plane in the sky.

2. a lot of factories polute our atmosphere.

3. sun is the biggest star in our galaxy.

4. people went to the moon in the 20th century.