43: has worked

44: was working

45: build - fly

46: lost

47: hasn't smoked

48: arrived - has just gone

49: have....been

50: Have...received

1.

1: Paris' the best place for many people to send their holiday

2: Because it is a glamorous city to visit 

3: Yes, they do

4: They go there in order to find inspiration for their works

2.

1: It's English

2: Some English people brought the English language to this new country

3: Yes, it is

4: English and Franch

3.

1: One thousand million people speak English in over the world

2: 400 million people speak English as the first language

3: Chinese

..............