The world economy has improved _____ since the end of last year, but major problems and challenges are not fully solved.
It has been accepted that all the students ____ put on masks before going to school in case they are infected with flu virus.
I’ll go to the party with you ____ you don’t wear those strange trousers.
-I need to put a cross on the map to show ____ that famous hotel is.-____? Mary’s done it already.
When ____ to danger and conflict, men tend to increase blood pressure, ____ nervous or anxious.
-Why are you still here? Everybody has gone to attend the lecture by the president.-Oh, I ____ about it!