—Are these buses?
—Yes,
A. it is B .these are C. they are.
The newly built school canteen(餐厅) is big enough to hold two ________ students at lunch time.
| A．thousand | B．thousands | C．thousand of | D．thousands of |
Every year lots of trees ________ to make our country more beautiful.
| A．is planted | B．was planted |
| C．are planted | D．were planted |
How kind you are! You always do what you can ________ me.
| A．help | B．helping | C．to help | D．helps |
---I have finished my homework already, Mum.
--- When ________ you ________ it?
| A．did; finished | B．did; finish |
| C．have; finished | D．were; finishing |
Lucy is ________ girl of the twin sisters.
| A．tall | B．taller | C．the taller | D．the tallest |