He was absorbed in his work so he didn’t_______to ask where his son went.

A. bother          B. wait

C. undertake       D. expect

So absorbed _____ in her work that she didn’t realize I was behind her.

1. A.
   did she
2. B.
   was she
3. C.
   she did
4. D.
   she was

So absorbed_____in her work that she didn’t realize I was behind her.

A．had she              B．was she             C．she had      D．she was

________ in what he was reading, he didn’t see me before he almost knocked me down.

So absorbed          in our talk that my brother took a wrong turn on the way to the airport.