改为同义句。I am sure that I can work it out however hard the problem is.I am sure that I can work it out________ ________ ________hard the problem is.
What beautiful flowers they are!(改为感叹句)
the flowers are!
You should n't walk across the road when the light is red!(改为祈使句)
across the road when the light is red!
Twenty foreign students visited our school yesterday.(改为一般疑问句)
twenty foreign students our school yesterday?
He hardly watches TV.(变成反意疑问句)
He hardly watches TV, ?
People drink Chinese tea all over the world.(改为被动语态)
Chinese tea all over the world.