5. Read and choose the best option to complete each of the blanks. Scientists say life started in the ocean. However, humans aren’t natural swimmers. We can (1)______ as babies, but we forget and the we must (2)______ to swim again. We must not (3)______ that our world is mainly water. So we should all learn to swim. We ought to try to stay away from water, but it is very difficult. The time always comes when we need (4)______ water. We (5)______ learn to swim when are young. It is easier to learn then. Our parents can help. They can give us the opportunity to learn to swim. 1. A. swimming B. swim C. swam D. swimmer 2. A. learn B. to learn C. learning D. learnt 3. A. forgot B. forgetting C. forget D. to forget 4. A. cross B. crossing C. to cross D. crossed 5. A. should B. ought not C. mustn’t D. shouldn’t Giusp m bài này v ạ Mình dang càn gấp k pahir giải thích đou ạ