--- How many students are there in your school?--- There are 2,000 students here __________.
They don’t know _______ their parents are.
I am sure _______ you said is true.
The old man told us _______ and ________.
---Do you know when the World Cup ________ next week? --- Next Friday. When it ________, I will ring you.
--- Today or tomorrow? --- What are you talking about? --- We are talking about _______ to give a talk on WTO.