【C6】A．BeforeB．By the timeC．Even ifD．Although

When will the airport reopen？A．By this morning.B．By noon.C．By early evening.D．By late even

A．WhetherB．WhenC．IfD．Although

A．Even ifB．BecauseC．IfD．For

【C15】A．ThusB．ThoughC．Even ifD．As

【C6】A．even ifB．untilC．ifD．when

【C2】A．whenB．wheneverC．ifD．even if