is this school____you visited last week? 可以用what 吗 为什么用the o

is this school____you visited last week? 可以用what 吗 为什么用the o is this school____you visited last week? 填the one 还是that还是wh The factory is the one （that） we visited last week为什么一定要用tha Is this factory ______you visited last week?为什么选C This is the factory where we visited last week. Is this the factory _____ we visited last week? 选择 is this the city _____he visited last week? is this the Computer center _____ you visited last week? This is the hospital（ ）he visited last week. Is this factory (the one)I visited last week . is this factory that we visited last week,为什么在that 前加the one Is this factory the one you visited last week.为什么THAT不可以替换 T