A．dangerous B．graceful C．gentle D．desperate
单项选择题I can （） you that the animals are well cared for in our zoo, so you needn't worry about them.
A．suppose B．assume C．assure D．grant
单项选择题I'm very grateful for your help and hope to do something for you （） in the future.
A．in exchange B．instead C．in return D．in particular
