易混词语
work at/work on/work out
You will have to ________ ________the weak points if you want to pass the examination.
We must ________ ________ a plan acceptable to all as quickly as we can.
The medicine the doctor gave him ________ ________his illness
You’ll solve this problem if you really ________ ________ it.
He was ________ ________a report about the harms of smoking when I visited him.