1. the secretary signed the letter (in/on/at) behalf of her boss.
2. you must study this paragraph (by/in/at) detail.
3. why can't you look at the problem (in/to/from) my point of
view.
4. we need sales people who can work (on/at/by) their own initiative.
5. harry managed to sell his house (on/in/at) a very high price.
6. (on / in / by) the whole it's a good idea, but there are one or two
problems
7. could you be quiet for a minute, please? i'm (at/ in / on) the
phone.
8. jim managed to climb into the house (under / for /by) means of a
ladder he found,
9. the company wants us to pay for the goods (on/in/at) advance.
10. (under / in / af) the terms of the agreement you have to pay a
monthly rent.​

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