Question

Jack should have taken the doctor's advice that he ________ in bed for a couple of days．

1. A.
   would lie
2. B.
   lie
3. C.
   must lie
4. D.
   lay

Answer 1

B
Jack本应该听医生的话躺在床上休息两三天。本句中后半句是同位语从句，由于前面有advice，所以从句中省略了should。