Раскройте скобки, употребив условные предложения 2 типа:
1) If he listened more carefully, he (not make) so many mistakes.
2)Do you think we would speak better if we (go) to England?
3) If you explained your problem to the manager, he (be able) to help you.
4) If we (equip) the house with a solar panel, we would have cheap energy.