_____, water turns into ice.A、When freezingB、When frozenC、When it has been frozenD、When

Please turn ______ the switch as soon as the water boils.

_________（47）A.disappearing into the water below.

_________（48）A.disappearing into the water below.

_________（49）A.disappearing into the water below.

_________（50）A.disappearing into the water below.

Please turn to your _____.I need to give this injection into your hip.