UnlikewatchingTV,readingisahighlyactiveprocessitrequiresattentionaswellasmemory------aswellasmemoryasimagination.A.untilB.butC.unlessD.forWhichone?Why?

Question

Unlike watching TV,reading is a highly active process___it requires attention as well as memory---
---as well as memory as imagination.
A.until B.but C.unless D.for
Which one?Why?

Answer 1

D.for
表示“因为”