(2013·天津,14)If he had spent more time practising speaking English before, he ________ able to speak it much better now.
Our maths teacher set so difficult an examination problem ______ none of us worked out.
This is the second factory, ______ I used to work, many workers of______ still have a good relationship with me.
It’s impossible for him to escape ______ this time; he made such a big mistake.
The ______ look on the student’s face suggested that your ______ question made him ______.
Only ______ as an interpreter ______ how important it was to grasp English.