Professor Smith, along with his assistants, ______ on the project day and night to meet the deadline.
| A．work | B．working | C．is working | D．are working |
This middle school is ______ to a teachers' college.
| A．attached | B．attracted | C．attacked | D．attempted |
______ good, this kind of fruit ______ very well in our city.
| A．Tasted; is sold | B．Being tasted, sells | C．Tasting; sells | D．Tasting; is sold |
.---Hurry ! It，s high time that we____to school.
---- Oh, if only the alarm clock____earlier.
| A．should go rang | B．shall go ; had rung |
| C．shall go ;rang | D．went ;had rang |
American- Indians____ about five percent of the USA population .
| A．fill up | B．bring up | C． make up | D．set up |
.They will start their project ____at helping the poor children to be educated in China＇s west.
| A．aims | B．aiming | C．being aimed | D．aimed |