句子写作：TodayatschoolMrMoorebroughtinhispetrabbit.Heshowedittotheclass.
Mr.Johnson______rathernotinvestthatmoneyinthestockmarket.
Veryfewpeopleunderstoodthiscontract,______wasveryobscure.
Ifyou_______inbehavinginthiswayyouwillbringyourselfnothingbuttrouble.
从母体获得的免疫球蛋白是（）
