The disappearance of dinosaurs made _______ the evolution and dominance of mammals on the earth.
A. it was possible B. it possible C. possible to be D. possible
I felt most angry about the way ______ I was treated when I was shopping.
A. when B. that C. which D. where
Regarding China-US differences on human rights issues, Hong said the two sides can enhance mutual understanding through dialogue ______ on equality and mutual respect.
A. based B. to base C. basing D. base
When we start gazing into the night sky with a telescope, soon we’ll be astonished by the realization _______ we and our world are part of this giant system.
A. which B. whether C. that D. as
Karaoke, which was invented by the Japanese, ______ both wonders and problems.
A. has been produced B. was produced C. produced D. has produced
European football is played in about 80 countries, _____ it the most popular sport in the world.
A. making B. made C. to make D. makes
