________ came to my house just now because there was a box of fruit in the doorway(门口).

—Would you like to hang out with me this weekend? —I'd love to, ______I have a lot of things to do.

---Can __________ work out the problem?---__________, I think. It is too hard.

He has saved lots of people’s________ since he came to this hospital last year.

I can’t believe __ a little girl can carry ___ many books.