Lesson 7 I can see twenty-one pens eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen twenty thirteenfourteenfifteenthirthirtyteenfourteenfortyfifteenfifty twenty thirty forty fifty sixty seventy eighty ninety one two three four five six seven eight nineHow many pencils can you see?I can see thirty-five.twenty-oneRulers80 pcsHow many rulers can you see?I can see eighty-six.How many erasers can you see?I can see fifty.How many ballpoint pens can you see?I can see fifty.How many can you see?I can see . ten dogs twenty-four homework1 1、用、用“How many can you see?”“How many can you see?” “I can see” “I can see”造造5 5个句子。个句子。2 2、 twenty-ninety twenty-ninety 整十数的数字各整十数的数字各 写写5 5遍。遍。