Today Xiao Li is absent ___the class. He ___ ill.
Science and technology have in important ways contributed to the improvement of agricultural production.
He is very sick. I insist that a doctor __________ immediately.
In the novel, the two cities referred to __________ London and Paris.
All the task __________ ahead of time, so they decided to go on holiday for a week.
—I didn’t know this was a one-way street, officer. —________.