I need to get through it, though，but I keep drifting away.
四级词汇讲解:
短语get through在句中意为“完成”;drift away在句中意为“走神，无法集中”。keep doing sth.表示“一直做某事”，强调持续的状态。
英语四级考点归纳：
短语get through在听力中还可能用到如下含义:
※ “消耗;用完，耗尽”。如:
We got through a lot of money while we were in Hong Kong.我们在香港时花掉了很多钱。
※ “顺利通过(考试等)”。如:
I hope I can get through the exam this time.希望我这次能通过考试。
※ “正式通过，获得采纳”。如:
They finally got the decision through Council。他们最终使委员会通过了决议。
※ “度过”。如:
We can get through this recession.我们可以熬过这次经济萧条。
From:https://www.zgghmh.com/CET-4/20003671.asp