His grandfather ______ for twelve years.
We’d better not keep the lights______ when we have PE classes outside.
----What would you like for your birthday ? What about an MP5?----Oh, to tell the truth, I ______ have an I-Pad than an MP5.
Father has had the computer _________. Now it works very well.
--- Is your mother badly ill?---NO, ,only a little cold
-- Do you know why he left so early ?--__________ for the English test, I guess.