【推荐1】Young people are seeking excitement and challenges, and going where big companies are is what leads to so many old people ________ (leave) alone in villages. (所给词的适当形式填空)

【推荐2】It was the first time she _____(leave) her motherland. (所给词的适当形式填空)

【推荐3】He was forbidden_____________ （leave）the base as a punishment.

【推荐1】________(bring) together the right people has also been a big challenge. (所给词的适当形式填空)

【推荐2】___________ (stay) with you in the past week is really a pleasant experience to me.

【推荐3】____(learn) to think critically is an important skill that today's children will need for the future. (用所给词的适当形式填空)

【推荐1】There used to_________(be) a big tall tree in front of the classroom. (所给词的适当形式填空)

【推荐2】Food is ________ fundamental to man as the people are to the state. （用适当的词填空）

【推荐3】They were frightened _________ death by the accident. （用适当的词填空）