_______ himself to finding out information, the researcher forgot to sleep.
________ to finding out information, the researcher forgot to sleep.
________ sth 把时间献给某事物；
2.devote oneself to sth ；
3.be devoted to sth
依据第一个使用方法，devote是sb主动发出的动作，所以
Devoting himself to finding out information, the researcher forgot to sleep.
依据第三个使用方法，在这里的 devoted 可以表示 sb 的状况，所以：
Devoted to finding out information, the researcher forgot to sleep.
Occupy也有不少使用方法:
1.be occupied in doing sth
2.be occupied with sth
3.occupy oneself in doing sth
4.occupy oneself with sth
依据第一种使用方法，所以：
Occupied(occupy）in a very important experiment he would not attend the party.
