The marathon attracted over 1,000 _________ from all over the country. (RUN)
runners
Radium was discovered by Marie Curie, one of the greatest ___________. (SCIENCE)
scientists
Jack didn't pass the high school exam because of his __________ (LAZY)
laziness
Lots of money is needed for the _______________ of a metro system. (DEVELOP)
development
We watched a film about the ____________ of chocolate. It's quite interesting. (PRODUCE)
production
I want to thank Mr. and Mrs. Lamton for their ___________. (KIND)
kindness
We are making some __________ in learning English. (IMPROVE)
improvements
I don't know what to wear tonight. Do you have any _____________?
suggestions
Tom is a quick __________. He can understand the tasks quickly. (LEARN)
learner
____________ is getting worse. More and more people are out of work these days. (EMPLOY)
unemployment
