He was absent for two weeks, so he had a lot of homework to ________.
-I'm sorry, I shouldn't have been so rude to you.--You___________ your temper but that's OK.
Whether ways will be found to stop pollution or not is just___________ worries the public.
The plan __________just because people were unwilling to cooperate (合作).
. The customer bargained with the shopkeeper for a long time, and finally they agreed ___________ the price.
Having received___________ training of the MS. Company, he was offered important position in management.