Lesson 7 I can see twenty-one pens eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen twenty thirteenfourteenfifteenthirthirtyteenfour teenfortyfifteenfifty 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 、用“ How many …can you see?” “I can see…” 造 5 个句子。2 、 twenty-ninety 整十数的数字各 写 5 遍。