Write the best word to complete the sentences.

1. They’re experts (in / on) farming.
2. When did you (set up / take up) tennis?
3. Her law firm has many famous (clients / customers) .
4. She’s actually my (ex- / former) wife; we got divorced last year.
5. When did they (set up / take up) the company?
6. The shop assistant was serving a (client / customer) .
7. Marcel used to work here, but he’s (currently / actually) working abroad.
8. Are they planning to (take up / take over) the company?
9. George Bush is (a former / an ex-) president of America.