They have been in the store( )A) for a long tine ago B) for nine o’clockC)since two hoursD)since two hours ago
问题描述：
They have been in the store( )
A) for a long tine ago
B) for nine o’clock
C)since two hours
D)since two hours ago
答
D (自从两个小时以前他们就在商店了， for +时间段）
答
D 两小时前他们就在这儿了