Leaves gradually _________ around the fallen trunks.
| A．gathered | B．accumulated |
| C．collected | D．assembled |
20.You have to have a good preparation for the exam__________ you can do well in it.
| A．in order to | B．such that | C．such as | D．so that |
--I'm calling to say goodbye. I'm flying home tomorrow.
--_________.
| A．I'm sorry to hear that. |
| B．Congratulations! |
| C．I'm not sure. |
| D．Have a nice trip! |
It's_________you do it fight now_________makes a difference.
| A．what; which | B．what; that | C．that; that | D．how; which |
They _________to see you off at the airport, but they got there too late.
| A．have hoped | B．had hoped | C．would hope | D．hope |
-- Excuse me, Sir. You_________take your camera into the museum.
-- Sorry, I didn't know and I promise you I_________.
| A．needn't; mustn't | B．can't; won't |
| C．mustn't; mustn't | D．may not; needn't |