蝗虫的若虫与成虫的主要区别是 [ ]
A.身体较大,生殖器官发育不成熟
B.身体较小,生殖器官发育成熟
C.身体较大,生殖器官发育成熟
D.身体较小,生殖器官发育不成熟
答案:D
Betty will ring me up when she ________ in Beijing. [ ]
A. arrive
B. arrives
C. arrived
D. will arrive
藩刻本