Bob was playing football in the park at 10 am this morning. Mark was sending e-mails until 11 pm last night. Tom was recovering in hospital for two weeks after his fall. Jane was reading the newspaper when the phone rang. Tom was watching TV when Jane arrived. --PAST SIMPLE OR PAST CONTINUOUS? PUT THE VERBS.

Вот правильные формы и почему именно так:

1. Bob was playing football in the park at 10 am this morning.
   — Past Continuous: действие было в процессе в конкретный момент (в 10 утра).

2. Mark sent e-mails until 11 pm last night.
   — Past Simple: «until» подчёркивает завершённость к определённому моменту («до 11 вечера»), результат важнее процесса.

3. Tom was recovering in hospital for two weeks after his fall.
   — Past Continuous: длительный процесс выздоровления в течение определённого периода («две недели»). (Возможен и вариант с состоянием: Tom was in hospital for two weeks, но с глаголом recover уместно подчеркнуть именно длительность процесса.)

4. Jane was reading the newspaper when the phone rang.
   — Фон/процесс (Past Continuous) прерывается кратким действием (Past Simple).

5. Tom was watching TV when Jane arrived.
   — Аналогично: длительное действие (Past Continuous) прерывается одноразовым фактом (Past Simple).