Complete the sentences 1.If I ______ (give up) smoking, I would save $5000 a year. 2. If I ______(can) get back to London in time, I'll definitely come. 3.If you buy one t-shirt, you ________ (buy) the second one free. 4. If I run into her, I ________(tell) her that you're looking for her. 5. If you were her, what ________ (to do)?