Giải giúp em với ạ...

II. Rewrite the following sentences 1. He doesn't see the signal so he doesn't stop his car → If 2. Mary doesn't have enough money. She can't buy a new car. → If........ 3. I don't know her e-mail address, so I can't tell you. → If 4. I have an allergy to fish. I can't eat them. →If.. ...