Though I haven’t seen Maria for ages, I could ____ her in the crowd at the station.

Customs and transport authorities should      the sales channel of fake notes by carrying on more checks on ports and waterways, it said.

 When I went into her room, she was ________ in her work.

You’d better fly somewhere in the west. Then you can ____ a hire car and travel around.

Many people can hardly______to buy a flat ,especially in big cities such as Beijing,Shanghai and Shenzhen.