I found ______difficult to choose one colour among them.
| A．that | B．it | C．this | D．both A and B |
There great changes in our city in the past 10 years.
| A．were | B．had | C．have been | D．have had |
Hurry up!The play for ten minutes.
| A．has begun | B．began | C．has been on | D．has been |
Look! The tree is growing well. When______?
| A．was it planted | B．did it plant |
| C．will it be planted | D．is it planted[ |
—How often does the boy go to see his granny?
—.
| A．Twice a month | B．Two times a month |
| C．Three time a month | D．One time a week |
The workers finished mending the road ____ this month.
| A．in | B．by | C．at | D．on |