一车西红柿重407千克，一筐茄子重37千克．多少筐茄子和一车西红柿的重量相等？
407÷37=11（筐）．
答：11筐茄子和一车西红柿的重量相等．
By the time Jack returned home from England, his son ________ from college.[ ]
A. graduated
B. has graduated
C. had been graduating
D. had graduated
县级或县级以上法院等机关在对信用社储户存款执行冻结时，冻结期限最长不超过（）。
A.1个月
B.3个月
C.6个月
D.12个月
