Neither English nor Chinese ________ difficult to learn.
C
neither…nor…是固定搭配，意思是：既不……也不……。它需要遵循就近原则，谓语动词应与Chinese一致，所以答案是C。
Chinaisamountainouscountry.Hills,mountains,andplateauscover_______ofthetotalarea.
Thegovernmentcalledoutpolicementosuppresstheriot.
TheNetherlandsistheonlycountryinEuropewhichpermitseuthanasia,________itisnottechnicallylegalthere.
______aretheprimarydestinationsfortheChineseatpresent.
In 1995,an average of _______ of domestic travelers went on sightseeing in China.