【单选题】In September 1944 he was able to return to his academic duties, but soon after the war ended he _______ a serious illness and did relatively little research thereafter (从那以后).
【单选题】In September1944 he was able to return to his academic duties ,but soon after the war ended he ____ a serious illness and did relatively little research thereafter(从那以后).
【简答题】In September 1944 he was able to return to his academic duties, but soon after the war ended he was stricken ____ a serious illness and did relatively little research thereafter ( 从那以后 ).