Lei Lei was only too ready to help others, seldom, _______, refusing them when they turned to him.
—May I speak to Mr.Smith? —I am afraid not.He is at a meeting now.It's not ________.
________ his strength failed and he dropped behind in the race.
To tell the truth, what you said was too ________ for us to understand.
In order to be a strong partner with the AsiaPacific region, American President Obama thinks it is ________ to have a strong relationship with China.
Doctors often advise us to pay more attention to our diets and mental health and to take ________ examinations.