题目
Female pandas usually have one or two babies________.A. at timesB. at onceC. at all timesD. at a time
Female pandas usually have one or two babies________.
A. at times
B. at once
C. at all times
D. at a time
题目解答
答案
D. at a time
A. at times
B. at once
C. at all times
D. at a time