What does tsunami look like

A．To collect some materials about cultures of a certain area.
B．To write a topic about her senior paper.
C．To make a research about the Amazon River.
D．To research an incidence.

A．He really thought it was impossible.
B．He thought there was no method for the girl to go there.
C．He was so surprised that he could not believe it was true at first.
D．He thought that was frightening.