If you want to walk on the moon, you mus
题型:选择题
问题:
If you want to walk on the moon, you must _______ a space helmet. [ ]
A. put up
B. wear
C. dress up
D. put on
If you want to walk on the moon, you must _______ a space helmet. [ ]
A. put up
B. wear
C. dress up
D. put on