• the answer is a lemon

• much greatly to his surprise

• at your service

• soul-searching

• answer to your prayers

• answer back

• press into service

• it's early days

• search me

• have seen good service

• know all the answers

• stand on ceremony

• take him by surprise

• a certain age

• serve a purpose

• serve it right

• scratch the surface

• serve him right

• come full circle

• serve its turn

• press it into service

• tip the scales at a certain weight

• a vicious circle

• be of service to him