26. I wondered what difficulty he had ________ the plan?
They need twenty more workers ______ their group to do the job.
In the cinema, there was an old man______ beside me.
He gets up early and reads English aloud, ___ he has greatly improved his English
The sun shines brightly in the sky______ us light and heat.
This is the ______ bag ______ lost yesterday, but it’s not mine.