There are so many beautiful clothes in the store. I really don’t know _____.
| A．what to choose | B．how to choose |
| C．when to choose | D．which to choose |
— What are the kids doing?
— They ______ flowers in the garden.
| A．water | B．watered | C．have watered | D．are watering |
She ______ to her feet and ran out of the room just now.
| A．jumped | B．jumps | C．was jumping | D．will jump |
Ask John ______ here at 7 pm tomorrow.
| A．come | B．coming | C．came | D．to come |
The air in Beijing is getting much ______ now than a few years ago.
| A．clean | B．cleaner | C．cleanest | D．the cleanest |
He has two pets. One is a dog, ______ is a cat.
| A．the other | B．other | C．others | D．another |