• 2022-06-15
    ()caused the accident is still a complete mystery
    A: What
    B: That
    C: How
    D: Where
  • A

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    • 0

      Where is the missing boy is still a _______. A: mystery B: mysterious

    • 1

      What caused the accident ______ on the road.

    • 2

      What happened to the missing child was still a _____. A: mystery B: mysterious

    • 3

      Officials have not yet __________ what caused the accident or the explosion.

    • 4

      It is a mystery ______ the prisoner escaped. A: how B: what C: that D: who