streporters have been sent to South Africa to ______ the 2010 World Cup, so wecan get informed of the situation there very quickly

Those who can achieve high grades in class tend to be weak in handling some practical problems, ________ is often the case.

Is there anything __________ in Mix City today–Yes. There is an ice skating performance __________ held for children.

Experts warn that global warming will cause dramatic climate changes, including more ________ floods,heat waves and droughts.[ ]

My friend ______ from the UK. She studied at Oxford for four years, during which we communicated with each other on the Internet.