21. You can’t imagine that ____ 8-year-old child should have ____ good knowledge of English.
A. a, a B. an, a C. an, 不填 D. a, 不填
22. So angry was the woman that she _____ the man who refused to say sorry to her.
A. looked at B. stared at C. glanced at D. glared at
23. It is believed that the driver’s carelessness is without doubt _____caused the accident.
A. how B. what C. that D. where
