Unit Two : Ensure Subject and Verb Agreement

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Unit Two Ensure Subject and Verb Agreement

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• A number of innovative developments ( has , have
  ) been made in the multi-component injection
  molding process in recent years.
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• A gas channel design that ( guides , guide ) the
  gas flow to the desired locations ( is , are )
  one of the key factors that determine a
  successful application.
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• The delay time along with gas injection points (
  is , are ) important in producing
  injection-molded parts of quality.
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• Neither the processing parameters nor the amount
  of polymer melt injection solely ( determine ,
  determines ) a successful gas channel design.
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• To select the number and locations of gas
  injection points and to determine the amount of
  polymer melt injection ( is , are ) essential to
  a successful application.
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• Ergonomics ( aim , aims ) to integrate worker
  comfort and productivity.
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• Each of the factors ( contribute , contributes )
  to a successful design.
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• The simulation in which the polymer melt flow (
  occurs , occur ) in thin cavities ( provides ,
  provide ) accurate predictions.
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• Establishing a general model or empirical formula
  in addition to describing the thickness variation
  of the skin melt that exists between the gas/melt
  interface and the cavity wall ( appear , appears
  ) to be necessary for further development.
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• The number of gas injection points ( are , is )
  important in producing quality injection-molded
  parts.
• ?? is

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