Tough ()experience,he managed to do a wonderful job in teach

Tough ()experience,he managed to do a wonderful job in teaching in the key university a.lacked b...
Tough ()experience,he managed to do a wonderful job in teaching in the key university a.lacked b.lacking of c.lacking d.lacked in 因为逻辑主语是he 那为什么不可以用b呢 lack in的用法又是怎样的呢