.—She must have gone back to the valley. —No, she_________. The entrance to it was nowhere to be found. 

(2013·东北三校4月二次联考)No matter how healthy you ________ be, you need to consult a doctor from time to time.

Some people who don’t like to talk much are not necessarily shy; they _____ just be quiet people. 

It is usually not quite cold in this area in March, but sometimes temperature ____be very low.

Some women ________ a good salary in a job instead of staying home, but they decided not to work for the sake of the family.