Both import and export trades can produce _____ effects on the home market. 

A.beneficial                                                  

B.below

C.benefit      

D.beyond

This watch is very complicated indeed. Once taken _____, it can hardly be put together again

A.loose                                                         

B.apart

C.improperly                                                

D.separately 

All life on the earth _____ on the sun.

A.depends                                                     

B.carries

C.keeps                                                        

D.goes

There are many _____ of selling manufactured goods to foreign buyers. 

A.systems                                                     

B.ways

C.directions                                                  

D.roads

Those who are _____ in marketing activities are all considered marketing employees.

A.included                                                    

B.interested

C.involved                                                    

D.informed