【推荐1】Spending a year working in the city helped to___(broad)his horizons. (所给词的适当形式填空)

【推荐2】Being exposed to a different culture will help children ________ (broad) their horizons and provide them with a chance to improve their foreign language. (所给词的适当形式填空)

【推荐3】Mike often go abroad to ________ (broad) his horizons. （所给词的适当形式填空）

【推荐1】Eighty dollars ________ (be) enough for her to buy the boots she wants. （所给词的适当形式填空）

【推荐2】This incident________(underline)the danger of travelling in the border area. （所给词的适当形式填空）

【推荐3】Either you or the president ___________(be) to hand out the prizes to these gifted winners at the meeting.  (所给词的适当形式填空)