I. Rewrite these sentences 1. Let's meet inside the center, at the cafe's corner. I suggest............................................................................................................................. 2. Keeping the environment clean is very important. It's....................................................................................................................................... 3. If someone doesn't put the coal in, the fire will go out. Unless................................................................................................................................. 4. Why don't you plant some trees around your house to get more fresh air? How about......................................................................................................... II. Write the correct form of the verb in each bracket. 1. My class ________ (visit) Uncle Ho's mausoleum last weekend......................... 2. We ________ (not meet) our classmates since we left school......................... 3. If we don't try to control pollution, it ________ (be) too late......................... 4. My father _______ (leave) Hanoi for Ho Chi Minh City two days ago......................... 5. Every day, my sister walks to school, but today she _________ (go) by bike.........................

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