The drivers on the highway have to stop because the thick fog makes ____difficult to see. A,them B,it C,that D,this
He had a strange hairstyle and he instantly became the ________ of attention the moment he stepped into the classroom.
—How do you find this new movie? —It's ________ interesting than expected.
It took us several hours to make the old man ________ of the safety of travelling by air.
No one can ________ how the election will turn out,as there are many unknown facts.
Anyone who is in ________ of weapons without permission is considered lawbreaking.