﹣The fridges are on sale in the supermarket today．
﹣Really？ Let's go and buy ____ for our new kitchen．（ ）
A．oneB．itC．thatD．them
﹣What is the ____ of your excellent spoken English？
﹣Practice makes perfect!（ ）
A．resultB．influenceC．dutyD．secret
﹣May I use your computer， Mr． Black？
﹣____．I will use my iPad instead．（ ）
A．Go aheadB．Thank you
C．Sorry， you can'tD．I'm afraid not
The Chinese government will always do ．（ ）
A．what has he promised to do
B．what has he promised do
C．what he has promised do
D．what he has promised to do
You must make sure your mask （口罩） is clean you put it on．（ ）
A．beforeB．afterC．sinceD．where