After four years’ research, we now have a ______ better understanding of the disease.

We don’t have enough money .We,_______, can’t afford to buy the car.

The mother looked at the door _______，expecting the children’s coming．

(2013·高考福建卷)Those poor and needy teenagers were excited to find a shop at the corner where they could buy ________ priced bikes.

—You don’t seem to be quite yourself today. What’s wrong? —Oh, I’m suffering from a cold. Nothing serious, _____.