The Spring Festival is ________unique day for families. It is also _______ day for special foods like niangao.
| A．an, a | B．an, the | C．a, a | D．the, a |
His father feels ___ his duty to help others.
| A．this | B．it | C．that | D．what |
I regret ___ harder in the past two years.
| A．not having studied | B．having studied | C．having not studied | D．not being studied |
Tom’t uncle must be an engineer, ____?
| A．mustn’t he | B．can't he | C．isn’t he | D．needn’t he |
I'm feeling blue, for they ate all the cake and _________left.
| A．none | B．everything | C．everyone | D．no one |
I wish for a family____________my parents are treating me like a friend.
| A．why | B．which | C．that | D．where |