Englishasaforeignlanguageisverydifficultintheabsenceofanativelanguageenvironment.A．LearnB．LearnedC．Learning

Question

________English as a foreign language is very difficult in the absence of a native language environment.

A．Learn　　　　　　 　　　　        B．Learned

C．Learning                         D．Having learned

Answer 1

C　

考查非谓语动词。“________English as a foreign language”在句中作主语，所给选项中只有动名词的一般式能在句中作主语，故选C。