----Do you know how the accident _______?
----Sorry, I don’t know.
A. come out
B. come into being
C. come about
______the problem clearly, Mary has to look for lots of information.
| A．To explain | B．Explaining |
| C．Explain | D．Explained |
As children_______, they learn from their experiences and form a picture of what the world is like.
| A．set up | B．grow up |
| C．wake up | D．come up |
I don’t know if he_______, if it_______tomorrow.
| A．will come; rains | B．comes; rains |
| C．will come; will rain | D．comes; will rain |
---I hear Tina_____to appear in the advertisement. Is that true?
---Oh, yes. She is busy preparing for it these days.
| A．invites | B．has invited |
| C．will invite | D．has been invited |
---Listen! Kate is singing in the classroom.
----It_____be Kate. She has gone to the Library.
| A．can | B．can’t |
| C．must | D．mustn’t |