It remains ________ whether the students will benefit from the monthly exams.
–The car comes to a sudden stop. What’s wrong? – The oil has_____.
She couldn’t go to the party that day because she_____.
Every year, the CCTV chooses ten most _____figures among ordinary people, whose actions can move China.
The book is written in _____easy English _____beginners can understand.
I couldn’t help but_____very concerned about his illness when I heard he was in hospital because of heart disease.