每个新人职教师都应学会做班主任工作，而班主任工作的中心是()。
Notallbirdscanfly,______doallbirdsbuildnests.
Manypatientsinsistonhavingwatcheswiththeminhospital,______theyhavenoschedulestokeep.
Icanspeak_____German.
句子写作：Suchanattitudewouldemphasizethevalueoflife.
Sincewehaveafocusedsubject，weshouldnottalk________.
