1 Mary is in Hanoi on a business trip, so you surely saw her twin sister at the cinema yesterday (making)

You must

2 What i particularly like about him is his generousity (impresses)

It is

3You should see the principle for futher advice, i think (refer)

I'd like

4 Helping the poor have a better standard of living is all he spends his time on. (life)

He devotes

5 The chidren were really good while the inspectors visited the school.

During

6 They are bound to win the scholarship (given)

In all

7 He had an accident, so he couldn't playing the last month ( part )

Due

8 It is envident that he is manking good progress at school ( well )

There's

9 After the official admitted taking bribes, he got lots of criticism from the public ( came)

Having

10 The person Jane likes most of all is her chemistry teacher ( affection )

There's no-one