21. My father is clearly in____ dilemma about how to handle___ quarrel between us.
A. the; a B. /; the C. a; the D. a; /
22. He always brings me a pretty gift ____ he comes to visit me.
A. by the time B. sometimes C. every time D. at times
23. Today, we’ll discuss a number of cases ____parents have much difficulty in communicating with their children.
A. which B. that C. where D. why
