The factory ________ in the newspaper that they had some old machines for sale.
| A．selected | B．solved | C．designed | D．advertised |
My new computer has ______ the old one．
A．twice as much memory asB．as twice much memory as
C．twice memory as much as D as much twice memory as
—Have you got an i Phone 5?
—No．
—You' d better buy ____．It' s really cool!
| A．one | B．it | C．that | D．this |
—When I first got to Harvard, my awkward English brought me great trouble.
——Oh, dear, it _______a struggle for you to keep up with other students.
| A．might be | B．can be | C．could have been | D．must have been |
—Jack, did you see my son Harry just now?
—No，Mrs. White. I _______computer games.
| A．have played | B．am playing | C．had played | D．was playing |
Water, which seems so simple and common, is ______ makes life possible.
| A．what | B．that | C．which | D．how |