题干
Tom is ________ his pen, but he can't ________ it. Let's help him.
A：find; look for
B：looking for; find
C：look for; find
D：finding; look for
答案(点此获取答案解析）
B
Tom is ________ his pen, but he can't ________ it. Let's help him.
A：find; look for
B：looking for; find
C：look for; find
D：finding; look for
