---Look at the boy running on the playground. Is it David?---It ________ be him. I saw him go to the teachers’ office just now.
I study _____ my math test ______Tuesday afternoon.
There’s ____ in the book, so no one is interested in it.
Tom wants to be ____ engineer when he _____ up.
This is Lucy’s book. Please _______. A. give her it B. give it to her C. give her to it
Excuse me, he wants _____ your family name. A. know B. knows C. to know