We had one or two difficulties along the way that we didn't ____. Some tests ____ you to find out the sex of your baby before it's born. We must ____ that tourism develops in harmony with the environment. Watercolor painting began to ____ in Britain around 1750. I tried phoning her, but I couldn’t ____ The fireworks begin at eight o'clock ____. A hammer is a simple ____. The two countries have ____ against their common enemy

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