While Jim ______the floor, someone ______at the door.
| A．was sweeping, was knocking | B．was sweeping, knocked |
| C．swept ,was knocking | D．swept, knocked |
____________visitors come to Kunming for travelling.
| A．Hundred of | B．Hundred |
| C．Hundreds of | D． Hundreds |
_________yogurt do we need?
---_________.
A, How much, littleB. How many, little
C. How much, a little D. How many, a little
----What’s your favorite sports?
----- ________
| A．Playing tennis | B．Animal World |
| C．Rice and carrots | D．Math and history |
There__________more pollution in the future, cities will be dirty.
| A． has | B． is | C．will be | D．are |
Would you mind ________me clean the floor.
| A．to help | B．helping | C．helps | D．helped |