The speech which he made_____the project has bothered me greatly.
A.being concerned
B.concerned
C.be concerned
D.concerning
请问这道题为什么选D不选B
On average every person in Britain uses 134 plastic bags a year——______can take up to 500 years to dacay in a landfill site.
A.every
B.everyon
C.each one
D.one
请问这道题为什么选C不选A