6.A)merge B)connect C)combine D)mix
7.A)busy B)small C)large D)heavy
8.A)when B)where C)which D)that
9.A)walk B)go C)take D)fix
10.A)more B)less C)very D)extremely
11.A)all of these B)None of these C)All roads D)Some of these
12.A)out of B)out C)through D)from
13.A)lying B)lie C)lies D)lay
14.A)direct B)indirect C)enjoyable D)beautiful
15.A)these B)which C)that D)where
Keys：A D C D D B D A C B D C A A D
