Here's the matching of the phrases with similar meanings, along with the formal phrases circled:

1. increase sharply - **d. go up a lot**
(Formal phrase: **increase sharply**)

2. need help - **f. require assistance**
(Formal phrase: **require assistance**)

3. find a job - **a. gain employment**
(Formal phrase: **gain employment**)

4. currently - **b. at the moment**
(Formal phrase: **currently**)

5. very important - **c. a high priority**
(Formal phrase: **a high priority**)

6. make a proposal - **e. suggest something**
(Formal phrase: **make a proposal**)