Do you have any difficulty in understanding ______(口语的) English?
I think we're being very short-sighted in not __________(开发)our own coal.
There is a dbecause the bridge is broken.
If you are very quiet, you can hear dmusic from the circus in town.
__________(贸易)between the two countries has increased.
They put all their ginto a shopping cart and left the supermarket.