________ too early to the foreign language study, according to some experts, may lead to some unfavorable outcomes.

Why don’t we choose that road to save time?—The bridge to it _____________

_____ to sunlight for too much time will do harm toone’s skin.

This Sunday is an important day for my parents. We’ll celebrate it because they ________for twenty years.

This task is _____difficult for us. We need ______people.