______Mum was ill yesterday, _______ she still went on working. A. Though; / B. Though; but C. Because; /
What will you be like ______?
I think there won’t be ______ schools in the future.
I think he will come back ______ three days.
We will use ______ and get ______ on the Internet.
---What is Mr Zhang doing? ---He is writing some English words ______ the blackboard ______ chalk.