Tired, Jim was fast asleep with his back __________ a big tree.
Last month, American scientists started working on _____ project aimed at improving _______ ability to predict earthquake.
-Does Bill do his new job well?-_______ his old job. I’m afraid there’s no hope for him.
. It’s impossible for a person______ a sense of responsibility to succeed.
.________ of the truth of the reports, he told his colleagues about it.
They wouldn’t agree to sell the house to us at the same price_______ they had promised,________ was rather disappointing.