You have 30 minutes to do this task. you have receive a letter from your german pen friend marta who is learning english. « know you have been learning english for about five years. i started to learn it just a year ago as my second foreign language. so i think you are more competent in english than i am. yesterday i read a book and could not understand some sentences. could you explain what the following sentences mean - «it was raining cats and dogs» and «he had a sweet tooth».