问题
选择题
—Hi, Susan, where were you at lunch time？I ________ a seat for you in the coffee shop.
—Oh, sorry to miss you.My political science class ran longer than usual.
A．am saving
B．was saving
C．had saved
D．have saved
答案
答案：B
考查时态。根据语境判断，吃饭是过去发生的事情，强调在吃饭的过程中“一直为对方留着位子”，所以应该用过去进行时。