Many in the credit industry expect that credit cards will eventually ____ paper money foralmost everypurchase.[ ]

When ________ on sand, the plant grows close to the ground, ________ narrow leaves and small flowers. [ ]

Tom ___ downloaded a virus into his computer, hecan not open the file now

Linda was walking in the street ________she noticed a thief stealing from a old lady

Jbut he ________ careful enough.