He insisted __ paying the bill.

in
on
for
to

Frequently Asked Questions

Question: He ran ___ fast that I couldn't catch him.
Answer: so
Question: You ___ obey your parents.
Answer: must
Question: She said, "I will help you."
Answer: She said she would help me.
Question: She is fond __ music.
Answer: of
Question: ___ sun rises in the east.
Answer: the
Question: She is ___ honest woman.
Answer: an
Question: He said, "I am tired." (Indirect)
Answer: He said that he was tired.
Question: She wrote a letter. (Passive)
Answer: A letter was written by her.
Question: They are painting the house. (Passive)
Answer: The house is being painted.
Question: He insisted __ paying the bill.
Answer: on