He was about half through his meal ______ a familiar voice came to his ears.
.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.
.Tom will succeed _____ your property after your death,but I don’t think he is______success.