一、用所给动词的适当的非谓语形式填空。
1．Having a trip abroad is good for the old couple, but it remains ________ (see) whether they will enjoy it.
答案 to be seen
2．Life is a journey ________ (fill) with hardships, joys and special moments.
答案 filled
3．Nowadays people separate their waste to make it easier for it ________ (reuse)．
答案 to be reused
4．________ (try) out different ideas, we are now getting closer to the answer.
答案 Having tried
5．He didn't keep on asking me the time any longer as he had had his watch ________ (repair)．
答案 repaired
