1. Mr. Montrose’s ______ in his job search has resulted in employment offers from three companies.
A. persist B. persisted C. persistently D. persistence
2. Because of its ______ for outstanding customer service, Mei’s Hair Salon is the most popular business of its kind in the area.
A. approval B. estimation C. probability D. reputation
3. Ferrelli Steel has ______ in talks with Montag Fabrics to purchase part of its manufacturing business.
A. involved B. engaged C. demonstrated D. maintained
4. All kinds of techniques and medicines ______ to extend human beings life in recent years.
A. have been developed B. were developed C. are being developed D. develop
5. The device is so ______ that it doesn’t even need a human to operate.
A. moved B. puzzled C. interested D. advanced