--Will you bring me some coffee? --____.
With a lot of problems ________, the newly – elected headmaster is having a hard time.
Soon after getting off his horse, the man appeared at the second storey windows, __ he could see nothing but trees.
Tom was very angry about ________ to Mary’s birthday party.
You can come here to ask me _____ if you have any questions.
Having a trip abroad is certainly good for the old couple, but it remains ______ whether they will enjoy it.