Christopher Columbus _______ American more than 500 years ago.

When I turned on my computer, I was shocked to find some junk mail, and I just delete it all

When my cat heard a noise in the bushes, she stopped moving and listen intently

Every morning, the sun shines in my bedroom window and waking me up.

We’ll be cycled to Hoa’s village at this time next Sunday

The train ______ half an hour ago.

The police arrested the man while he is having dinner in a restaurant.

Some people are believing there is life on other planets.

Recently, the island of Hawaii had been the subject o fintensive research on the occurrence of earthquakes.

What will you do when your friends won’t come ?

When I last saw him, he _____ in London.

My sister ________ for you since yesterday

He fell down when he ______ towards the church.

We _______ there when our father died.

I ______ to New York three times this year.

John ______ a book when I saw him.