With real estate （房地产）______ in economy, a lot ofrich farmland had to ______ new houses and offices in the area.

Keeping a balanced diet is one way ______ one can keep healthy.

His first book ______ next month is based on a true story.[ ]

The seals were stranded（搁浅）on the Rhode Islandbeaches,_____ they were rescued last year.

Excuse me. Could you tell me _______ the Blue Mercury(蓝水星) — About an hour.