Fill in each blank with on suitable preposition

Đề bài: Fill in each blank with on suitable preposition
----- Nội dung dịch tự động từ ảnh -----
41- They will get two weeks.......
............ Easter.
42- The factory was fined ................ dumping chemicals ................... the river.
43- Your friendly attitude makes it easier..........you to get on
44- .......... rush-hours, buses are usually full ......
petrol.
45- They've run
46- She suggested going....... .....a swim.
47- She apologized............. me
me ......
.......
.................keeping me waiting.
....... your classmates.