Thedesksandseatscanbeusedforalongperiodo
问题:
The desks and seats can be used for a long period of time, they _____ the height of the children. [ ]
A. must be adjusted to
B. can be adjusted to
C. must adjust to
D. can adjust to
The desks and seats can be used for a long period of time, they _____ the height of the children. [ ]
A. must be adjusted to
B. can be adjusted to
C. must adjust to
D. can adjust to