What languages do you know German and English?

What languages do you know German and English?
 What languages do you know             German and English?       a.except                      b.beyond                     c.besides                            d.above6.He’s been             my letter for months; why doesn’t he answer it?       a.responding to            b.sitting on                  c.listening to                      d.working on12.Growth should not be             at the expense of environmental pollution.       a.pursued                    b.proposed                  c.tracked                            d.traced