Make sure that your speech is _________ and to the point, so that the audience will not get bored just because they have to listen to you talking for a long time.
Faced with a bill for $10,000, _________________.
Modern forms of transportation and communication have done much to ________ the isolation(隔离) of life in Alaska.
The two birds _________ each other in shape and color. In other words, they ________ each other in shape and color.
–What have been doing _______? I’ve been so little of you. --I have to leave early for work and comes home very ________.
__________ about wild plants that they decided to make a trip to Madagascar for further research.