____ good exercise. [ ] A. Climbing hill
题型:选择题
问题:
____ good exercise. [ ]
A. Climbing hills is
B. Climbing the hill is
C. The climbing hills are
D. The climbing of hills are
____ good exercise. [ ]
A. Climbing hills is
B. Climbing the hill is
C. The climbing hills are
D. The climbing of hills are