A:且
B:或()
C:()且
D:且()
小宇同学为了检验某根钢条是否具有磁性,它将钢条的A端靠近小磁针的N极,发现它们相互吸引;当仍将钢条的A端靠近小磁针的S极时,发现它们仍然相互吸引,则( )
—Tom wants to know if you _______ a picnic next Sunday
—Yes. But if it __________ , we’ll visit the museum instead