_____ to the United States? –No, never. But I went to Canada a few years ago.

Tokyo will host2020 Sumner Olympics． —Really? It will befirst Asian city to host the Olympics twice．

So far, how long _______ you __________ China? — For one year.

In the UK and the USA people often give flowers and cakes as birthday presents. They ________ open their presents at once.

What’s the time by your watch?—It’s ________.