1 . The activity has been arranged for their________(方便). (根据汉语提示单词拼写)

3 . To enjoy the ________(convenient) of digital payment, many senior citizens started to use smartphones.（所给词的适当形式填空）

4 . 为了方便起见，科学家将直接录下海豚的声音。
______ ______, scientists will directly record the sound of the dolphin.

5 . 在这四个国家中，英格兰是最大。为了方便起见，它大致可以划分为三个地区。
England is the largest of the four countries, and ____ ____ it is ____ divided into three zones.

6 . For the sake of ______(便利), the two groups have been treated as one in this report. （根据汉语提示单词拼写）

7 . Please come at your __________ (方便), and you are always welcomed. (根据汉语提示单词拼写)

8 . Many people enjoy the pleasure and c_________ of living in the city center. （根据首字母单词拼写）

9 . Seats are provided for the_______ (方便) of the passengers in this city's public transport. (根据汉语提示单词拼写)

10 . Please send me an answer at your ____________(方便，便利). （根据汉语提示单词拼写）