22. “How long do you suppose it is _______ he left for Japan?” “No more than half a month.”
The door remained ____. I didn’t know where he had gone to .
---_____is his mother? ----She is a lawyer.
---We are going to have a picnic tomorrow. It won't rain, will it? ---_____.
____ it is to collect stamps!
---What do you think of this maths problem? Is it too hard?----Not ___.