If my father [ ] a lawyer, I wouldn't have studied law (not to be) hint: Your father is still alive [ a) wasn't b) weren't c) hadn't been ]	(wasn't|weren't)If I [ ] how to solve this problem I would help you (to know) [ a) knew b) had known c) know ]	knewIf they [ ] the contract, then who is responsible (not to breach)? [ a) hadn't breached b) didn't breach c) don't breach ]	didn't breachIf this hardware were cheaper and more reliable, we [ ] it already (to buy) [ a) would have bought b) would buy c) bought ]	would have boughtSales would reach our targets this month if we [ ] enough in R'n D 2 years ago (to invest) [ a) invested b) had invested c) would invest ]	had investedIf the company [ ] their main competitor today, they would have cash flow issues (to take over) hint: it is supposed to take over [ a) hadn't taken over b) took over c) take over ]	took overIf we [ ] ready to sign the contract today, we would need to prepare better (to be) hint: it is supposed you are not ready [ a) were to be b) are c) will be ]	were to beIf he had carried out a market survey earlier, today he [ ] market needs better (to understand) [ a) would understand b) would have understood c) understood ]	would understand