Răspuns:
1.at the zoo 2.in an exam 3.in the park 4.before you eat them 5.at night 6.in cold weather
ex.2. mustn't run ,can't throw,we can take pictures, we can buy,we can't spend,I can't eat to much,you can make,I can't wait,I must go now.
ex.3 I shouldn't eat children mustn't sleep
