We have a pet dog. I am responsible ____ taking him for a walk every afternoon.
A.to B.for C.in D.at
All passengers ________ go through safety check before they take a plane.
A.can B.must C.may D.ought
We have a pet dog. I am responsible ____ taking him for a walk every afternoon.
A.to B.for C.in D.at
All passengers ________ go through safety check before they take a plane.
A.can B.must C.may D.ought