21. It’s not ___ good idea to drive for four hours without ___ break.
A. a ; a B. the ; a C. the ; the D. a ; the
22.Nobody wants to___________ especially in public.
A. make fun of B. be made fun of C. making fun of D. made fun of
23. When we climbed up to the top of the mountain, we were all ___________.
A. out of the breath B. short of the breath
C. out of breath D. short of breaths
