---How did you work out the difficult chemistry problem?
--- I worked it out by ________.
A．working with a group B．think very hard
C．ask the teacher for help D．doing oneself
By the time we rushed to the hall, the party ________ for ten minutes.
A．had begun B．began C．was on D．had been on.
Jenny ________ some clothes to charity because the children in some poor areas need them.
A．gave out B．gave away
C．handed out D．gave up
The singer sang many songs, ________ some of my favorites.
A．include B．included
C．including D．to include
I like the house in ________ I used to live.
A．that B．which C．where D．what
The book ________ be Tom’s. Look! His name is on it.
A．have to B．might C．could D．must
