Aftermonthsofvoyage,Columbusarrivedin______laterprovedtobeanewcontinent.
C
注意， 本句话并非定语从句， 而是宾语从句。 因为在介词 in 后面，应该用 what 引导的宾语从句， what 在宾语从句中作主语。
Theprofessoraskedaquestion,andDavid________agoodanswer.
At any rate I did not succeed _______ myself understood by you.