题干
My bad tooth ________ again and I will have it ________ out next week.
A：aches; to pull
B：is ached; pull
C：aches; pulled
D：is ached; pulling
答案(点此获取答案解析）
C
My bad tooth ________ again and I will have it ________ out next week.
A：aches; to pull
B：is ached; pull
C：aches; pulled
D：is ached; pulling
=
+t
则t的取值范围是