However，at times this balance in nature is _______ resulting in a number of possibly unforeseen effects.

Break the wall between you and ________. We will become good friends.

The publication of Great Expectations, which ________ both widely reviewed and highly praised, strengthened Dickens’ status as a leading novelist.

______, I am determined not to play computer games and ______myself in doing something meaningful. [ ]

Why are you late again—Something happened to our friend Wang Fei. I _____ tohelp him.