Being a parent is not always easy, and being the parent of a child with special needs often carries with（）extra stress.

单项选择题（）twice, the postman refused to deliver our letters unless we chained our dog.

A. Being bitten
B. Bitten
C. Having bitten
D. To be bitten

单项选择题The biggest whale is（）blue whale, which grows to be about 29 meters long—the height of（）9-storey building.

A.the；the
B.a；a
C.a；the
D.the；a

单项选择题John was given the same suitcase his father and grandfather（）with them to school.

A. took
B. had taken
C. were taking
D. would take