have you been married? —For twenty years.

Our English ______ far better in a month if we try harder.

My parents will go to Mount Emei for ____ holiday. –That means you will have to be at home by _____.

__________world we live in is __________world full of colours.

The new CRH train between Beijing and Shanghai _______ speed once reached about 350km/h has had a 50 kph speed cut to 300 kph.