Where is my pen ? Millie it here but I can’t find it .A. putsB. putC. is puttingD. was pu

问题补充：

Where is my pen ? Millie it here but I can’t find it .

A. puts

B. put

C. is putting

D. was putting

答案：

A. puts

(答案→)B. put

C. is putting

D. was putting

解析：句意：我的钢笔在哪儿？——米利把它放在这儿了，但是我不能找到它。结合语境可知下文描述的是刚才发生的动作，故用一般过去时态。Put的过去式和原形动词词形一致，故选B。