Choose the correct form of the verb:
1. He (reads, will read, will be reading) letters from 9 till 11 a. m. tomorrow.
2. The boys will be looking at their collections of stamps when their mother (will come, is coming, comes).
3. You (will speak, will be speaking, are speaking, speak) over the phone, when your sister comes home.
4. I (shall write, shall be writing, am writing) a letter to my friend when you come.
5. Helen (will collect, will be collecting, collects) postcards during a year.