Question

用所给动词正确时态填空

1)You should go to bed．You ________(watch)TV for 5 hours．

2)I ________(write)letters since breakfast．

3)I ________(write)three letters since breakfast．

4)Sorry, but Mr．Smith ________(leave)for Beijing．

5)I ________(look)for him everywhere, where can he be?

Answer 1

答案：
解析：

　　1)have been watching

　　2)have been writing

　　3)have written

　　4)has left

　　5)have been looking