the airline requires that the passenger … his seat belt fastened at all times during take-off and landing?

the airline requires that the passenger … his seat belt fastened at all times during take-off and landing?

  1. kept
  2. keep
  3. keeps
  4. keeping
  5. Semua jawaban benar

Jawaban: D. keeping.

Dilansir dari ensiklopedia, the airline requires that the passenger … his seat belt fastened at all times during take-off and landing keeping.

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