The math question is difficult for the students work out.
He took up my cellphone and made a long distance call as if the phone _____ him.
Her son _____ coke , but now he ____ milk.
I began watching here an hour ago, but now nothing _______ yet.
---- A number of voiunteers _____ willing to teach in China’s rural areas.----- Yes. The number _____ getting bigger and bigger.
It’s sometimes hard to tell one twin from _____.