roBErt j. oppEnhEimEr wAs A FAmousAmEriCAn physiCist, who DirECtED thE {{u}} (1) {{/u}} oF thE First AtomiC BomBs. oppEnhEimEr wAs Born in nEw yorkCity onApril 22, 1904, AnD wAs EDuCAtED At hArvArD univErsity AnD thE univErsitiEs oFCAmBriDgE.AFtEr {{u}} (2) {{/u}} thE intErnAtionAlEDuCAtionBoArD From 1928 to 1929, hE BECAmE A proFEssor oF physiCs At thE univErsity oFCAliForniA AnD thECAliForniA institutE oF tEChnology, whErE hE Built up lArgE {{u}} (3) {{/u}} oF thEorEtiCAl physiCs. hE wAs notED For his ContriButions {{u}} (4) {{/u}} to thE thEory oF rElAtivity, CosmiC rAys, AnD nEutron stArs. From 1943 to 1945 , oppEnhEimEr sErvED As DirECtor oF thE AtomiC BomB projECt At losAlAmos, nEw mExiCo. his lEADErship AnD orgAnizAtionAl skills {{u}} (5) {{/u}} him thE prEsiDEntiAl mEDAl oF mErit in 1946. in 1947 hE BECAmE DirECtor oF thE institutE ForADvAnCED stuDiEs in prinCEton, nEw jErsEy, sErving thErE {{u}} (6) {{/u}} thE yEAr BEForE his DEAth. hE wAs Also ChAirmAn oF thE gEnErAlADvisoryCommittEE oF thEAtomiCEnErgyCommission From 1947 to 1952 AnD sErvED {{u}} (7) {{/u}} As An ADvisEr. in 1954, howEvEr, hE wAs suspEnDED From this position {{u}} (8) {{/u}} his pAst AssoCiAtion withCommunists. this ACtion {{u}} (9) {{/u}} thE politiCAl AtmosphErE oF thE timE, As wEll As thE DislikE oF somE politiCiAns AnD militAry {{u}} (10) {{/u}} For oppEnhEimEr’s opposition to DEvElopmEnt oF thE hyDrogEn BomB AnD his {{u}} (11) {{/u}} oF Arms Control. his {{u}} (12) {{/u}} wAs not rEAlly in DouBt. {{u}} (13) {{/u}}, EFForts wErE mADE to ClEAr his nAmE, AnD in 1963 thEAEC、{{u}} (14) {{/u}} him its highEst honor, thEEnriCo FErmiAwArD、oppEnhEimEr {{u}} (15) {{/u}} his FinAl yEArs to stuDy oF thE rElAtionship BEtwEEn sCiEnCE AnD soCiEty. hE DiED in prinCEton on FEBruAry 18, 1967.

A．yEt
B．not yEt
C．not until
D．until