Burning all the lights in the classroom will be a great______ on electric power.
| A．waste | B．lack | C．drain | D．damage |
I will never forget the day _____ we worked together in London．
| A．when | B．on that | C．which | D．while |
—That must have been a long trip．
—Yeah, it us a whole week to get there．
| A．takes | B．has taken | C．took | D．was taking |
To get a better grade, you should __________the notes again before the test．
| A．go over | B．get over | C．turn over | D．take over |
Mary, I_____ John of his promise to help you．
| A．told | B．reminded | C．warned | D．advised |
I got this bicycle for______：My friend gave it to me when she bought a new one．
| A．everything | B．something | C．anything | D．nothing |