1.Only when your identity has been checked,______.
A.you are allowed in B.you will be allowed in
C.will you allow in D.will you be allowed in
2.I can think of many cases______students obviously knew a lot of English words and expressions but could not write a good essay.
A.why B.which C.as D.where
3.Victor apologized for_____to inform me of the change in the plan.
A.his being not able B.him not be able
C.his not being able D.his to be not able