I had great difficulty ______ the suitable food on the menu in that restaurant.
Teachers have to constantly update their knowledge in order to maintain their professional __________.
I don’t like fish, so I ________ eat it unless I was extremely hungry.
I have no idea ____________ measures the government will take to stop the river from being further polluted.
Scientists are convinced __________ the positive effect of laughter _________ physical and mental health.
The little girl __________ the money for herself, but she __________ it away.