—When does your mother go shopping？
—Usually________Sunday morning．
| A．on |
| B．in |
| C．at |
| D．for |
Dad advised us to practice _____ our tent in the yard several times before we went camping.
| A．to put up | B．putting up |
| C．taking up | D．to take up |
Mom, you’ve bought the wrong shirt. It’s not the red one _____ the blue one.
| A．or | B．and | C．but | D．either |
--- Joe, would you like to play _____ volleyball with us this afternoon?
--- Sorry, I need to practice playing ______ piano.
| A．a; the | B．the; a | C．不填, a | D．不填, the |
People have learned a lot from _______ / saɪən'tɪfɪk / studies.
| A．science | B．scientific |
| C．sight | D．sightseeing |
All of the books are worth ________ /'riːdɪŋ/.
| A．read | B．red | C．reading | D．reads |