Question

Choose the correct form.

They seldom quarrel / are quarrelling.
The Earth moves round the Sun / is moving.
Now they are crossing / cross the street.
Birds fly / are flying to warm countries in autumn.
The children often laugh / are laughing at their funny little friend.

Answer 1

They seldom quarrel. - Present Simple

The Earth moves round the Sun. - Present Simple

Now they are crossing the street. - Present Continuous

Birds fly to warm countries in autumn. - Present Simple

The children often laugh at their funny little friend. - Present Simple