-What's up? You look worried.Well,I_____on the problem for 5 hours but I haven't got a single clue.
Until today we have reached a stage _______ we have almost no rights at all.
“We can hardly wait to see him” has same meaning as _________.
Have you seen Tom recently? I wonder ______ with his students.
It was because of bad weather ____ the football match had to be put off.
All examinations are passed. This is the first time I ____ really relaxed.