The doctor told me to __________ for a week.
–Jack is good at maths and doesn’t perform well in English.–_____.
It is these poisonous products _____ can cause the symptoms of the flu, such as headaches and aching muscles.
–Are you coming to Jeff’s party?–I’m not sure. I _____ go to the concert instead.
Sorry, I am late. I _____ have turned off the alarm clock and gone back to sleep again.
Children under 12 years of age in that country _____ be under adult supervision when is a public library.