The researchers found the age at which young people first fall ______ to bullies seems to determine how much it affects them.

After negotiation for some time, all the members of the...

单项选择题After negotiation for some time, all the members of the association promised to ______ to the strict code of practice.

The profession fell into ______, with some physicists s...

单项选择题The profession fell into ______, with some physicists sticking to existing theories, while others came up with the big-bang theory.