【推荐1】For thousands of t______ from China, Singapore is a wonderful and safe place to take a holiday.

【推荐2】I think the new camera is one of the __________ (tour) over there. Please return it to him.

【推荐3】Look! The ________ (tour) on the Great Wall are taking photos happily.

【推荐1】The customer thought the ________ (potato) weren't thin enough.

【推荐2】________ (参观者) must show their health QR codes before they go into the museum.

【推荐3】B)根据句子意思，用括号中所给单词的适当形式填空。
1. Oil________ (pollute) is the main cause of death for seabirds.
2. One of the ________ (beautiful) of living in Nanjing is that it's so peaceful.
3. When winter comes, a lot of birds fly to the________ (south) part of the country.
4. I have never seen a ________ (tiny) person than this. How unbelievable!
5. Barry was sitting on the bed, ________ (tie)the laces of an old pair of running shoes.