Complete the sentences with switchable phrases and idoms from the box.

let alone	would rather	high time	as soon as	scarcely had
as if	lest	have to	no sooner	had better

(a) _________ he arrived at the examination centre, he realized he was underprepared.(b) You ___________ study hard if you want to pass the test.(c) I ____________ play tennis than go to the dentist.(d) You __________ start saving money if you want to buy a car. (e) She can't even solve simple math problems, _________ calculus.(f) ___________ she left the house when it started raining.(g) He talks _________ he knew everything. (h) She was afraid _________ she had revealed too much.(1) It's __________ for you to learn how to cook before you move out of the house.(j)__________had they started their walk than it started to rain.