21.The teacher was angry at ___c___ again.
A.he was late B.he being late C.his being late D.him being late
22.Do you agree __d___ him?
A.on B.in C.to D.with
23.The small child didn’t go to bed ___c___ his mother arrived home.
A.if B.when C.until D.while
24.The government offered money to those ___a___ houses were damaged by the earthquake.
A.whose B.who C.which D.when
25.So little __d____ about stock exchange that I couldn’t give him any advice.
A.I knew B.I had known C.I was known D.did I know