7. Expand the brackets, using the verb in Present Simple, Past Simple or Future Simple:
1) Some common symptoms of nutrient deficiencies … (follow).
2) Shortages or defi¬ciencies of various nutrients … generally (produce) observable effects on the animal.
3) Normal animal rations generally… (contain) ade¬quate levels of carbohydrates last year.
4) Weakness in the legs … (be) the cause of swine disease a month ago.
5) Vets … (observe) poor blood clotting in cows next year due to lack of vitamin K.
6) Animals … (suffer) from scurvy due to lack of vitamin C.
7) Enlarged thyroid gland in the neck … (be) due to lack of iodine.

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