15b

Question 1

The ultimate in

Answer 1

The best/most advanced

Question 2

Catch/take unawares

Answer 2

Happen when u are least expecting it

Question 3

Unbeknown to sb

Answer 3

When sb is unaware of sth

Question 4

In no uncertain terms

Answer 4

Clearly and unmistakably

Question 5

Be given to understand that

Answer 5

Be informed about sth but not directly

Question 6

Come unstuck

Answer 6

Fail badly in sth u are trying to achieve

Question 7

Be up against sth

Answer 7

Have a difficult situation or problem to deal with

Question 8

Be quick on the uptake

Answer 8

Able to understand things quickly, clever

Question 9

Not be up to much

Answer 9

Of poor quality

Question 10

Have its uses

Answer 10

Have advantages or benefits

Question 11

To the utmost

Answer 11

To the greatest extent

Question 12

Do sth in vain

Answer 12

Not succeed in sth

Question 13

Banging your head against a brick wall

Answer 13

Frustrated because sb is stopping you from making progress in sth

Question 14

Sb or sth is driving you up the wall

Answer 14

Sb or sth is annoying and irritating you

Question 15

Have a whale of a time

Answer 15

Enjoy oneself very much

Question 16

Put years on sb

Answer 16

Make sb look or feel much older

Question 17

As yet

Answer 17

Up until the present time

Question 18

Go from bad to worse

Answer 18

Become more unpleasant

Question 19

If the worst comes to the worst

Answer 19

If the situation develops in the most unfavorable way possible