Question

3. Recently I           work that I have lost a lot of time to take care of my children. (occupy)

最近我太忙于工作，以至于我失去了很多照看孩子的時間。

Answer 1

3. have been so occupied with考查"如此.. 以至于"的句型用法。如此……以至于用so  adj/ adv. that…來表示。"忙于做某事"用be occupied with來表示。此句中有recently,因此要用現(xiàn)在完成時。