.—Please go and say hello to your aunt.She’s in the living room now. —She has arrived! But when ______ she ______?
How much time do you often spend _________ English every day?
Dr. Frank failed many times but he finally _________ to find a successful way to solve the problem.
It is said ______ vegetables and fruits are good to our health, apples and pears _________.
On August 15th, 2012, many people volunteered to Lei Feng Memorial in Fushun, Liaoning Province ___________ this great soldier(1940---1962).
Jack, please do not _______ yourself in that matter, or you will be in great trouble.