1. Emily _ things from all types of materials . ( take an interest in ) 2. This business _ the _ and retail sales of garden tools . ( specialize , manufacture ) 3. The skin on our body is a good _ the virus unless it is broken or cut . ( barrier ) 4. The poster _ put down their smartphones and have more face - to - face communication with each other . ( call for ) 5. It is important to select and hire the best _ the post . ( candidate )

步骤 1：确定动词短语
take an interest in making 短语take an interest in表示“对......感兴趣”，它的句型结构是take an interest in doing sth.表示“对做某事感兴趣”，主语Emily是第三人称单数，谓语动词需要加s，所填动词短语形式应为takes an interest in；things前缺少动词，再根据from all types of materials以及本题的句意Emily对用各种材料做东西很感兴趣，可以判断出来things前面缺少的动词应为making，所以本题的答案是takes an interest in making。
步骤 2：确定动词和名词
specializes in , manufacture 短语specialize in sth.表示“专门从事某事”，主语This business（这家企业）是第三人称单数，谓语动词需要加s，所填动词短语形式应为specializes in；manufacture意为制造，可以是及物动词也可以作名词，作名词时是不可数名词，所以本题的答案是specializes in , manufacture。
步骤 3：确定名词
barrier to barrier意为障碍，短语a barrier to sth.或a barrier to doing sth.表示“对某事或做某事的障碍”， 所以本题的答案是barrier to。
步骤 4：确定动词短语
calls for people to 短语call for表示“号召、呼吁”，它的句型结构是call for sb. to do sth.表示“号召或呼吁某人做某事”，主语The poster（海报）是第三人称单数，谓语动词需要加s，所填动词短语形式应为calls for；根据句型结构call for sb. to do sth.可得知短语中缺少宾语，再根据put down their smartphones中的their和句意这份海报呼吁人们放下智能手机，多面对面交流，可以判断出来缺少的宾语应为people，所以本题的答案是calls for people to。
步骤 5：确定名词
candidates for 句型结构It is+形容词+(for sb.)+to do sth.表示“对某人来说做某事是......”，post意为职位，candidate意为候选人，the best candidates for sth.表示“某事的最佳人选”，所以本题的答案是candidates for。