As far as I know, this maths problem is _______________ that one.
| A．twice so difficult as | B．twice as difficult as |
| C．as twice difficult as | D．so twice difficult as |
. Tom as well as his classmates __________ a song when the teacher came into the classroom.
| A．are singing | B．were singing | C．is singing | D．was singing |
. Only when your identity(身份) has been checked, _____________________.
| A．you are allowed in | B．you will be allowed in |
| C．will you allow in | D．will you be allowed in |
Edward, you play so well. But I ________ you played the piano.
| A．didn’t know | B．hadn’t known | C．don’t know | D．haven’t known |
. She would rather ________ the difficult situation in the new neighbourhood than move back.
| A．make good use of | B．set her heart on | C．come to terms with | D．keep in touch with |