When he heard the _________ news, he was so _______.

Scientists ______ thousands of chemicals before they decided on the right one in the end.

In those years, poverty ______, hungry farmers wandered about the countryside.

What do you think of his opinion—No one has given me ___________ piece of advice.

h having discussed it for long, they still haven’t reached an agreement ________ they should pour more money into the project.