Definition: to start to sleep or become ill Level: B1
我在看电视时在沙发上睡着了。
I ___fell ___asleep on the sofa while watching TV.
不幸的是，她生病了，所以我们不得不取消计划。
Unfortunately, she ___fell ___ill, so we had to cancel our plans.
如果你早点睡着，早上会感觉精神焕发。
If you ___fall ___asleep early, you'll feel refreshed in the morning.
