I have an appointment _______ Dr.Brown,but I need to change it.
Michelle found a job as a high school teacher which ________ spending quite a lot of time with students.
When the group discussion is nearing its end,make sure to ________ it with important points.
If you are in trouble,Mike is always willing to ________a hand.
The watch was very good,and he ________ 20 percent down for it.
Try not to cough more than you can________since it may cause problems to your lungs.