594. How long does it take for a letter to get to America from Beijing?　

信从北京到美国要多久？　

593. Don't forget to put stamps on your letter. 别忘了贴邮票。　

592. We keep in touch with each other by Email since he left China.　

他离开中国以后，我们用Email保持联系。　

591. My mother mailed me a parcel. 我妈给我寄了一个包裹。　

590. He hasn't answered my letter yet. 他还没有给我回信。　

589. I put some photographs in the envelope. 我在信里夹了几张照片。　

588. Send a postcard to me when you arrive in Shanghai. 你到上海以后给我发张　

明信片。　

587. I haven't heard from him for a long time. 我很久没有收到他的信了。　

586. I have received a letter from my cousin. 我收到了我表兄的信。　

585. I tried to call you, but the line was busy. 我试着给你打电话，但老占　

线。