Start studying early and don’t study too much .
| A．at one time | B．at a time |
| C．at times | D．from time to time |
_____ in Paris, the Louvre is one of the world’s largest art galleries.
| A．Locating | B．Located |
| C．Having been located | D．Being located |
We have done half the work so far. _____, we’ll have finished it by December.
| A．Unluckily | B．Fortunately | C．Hopefully | D．Thankfully |
She walked home by herself at night, _____ she knew that it was dangerous.
| A．once | B．as | C．unless | D．although |
We _____ close friends since we got to know each other in 2006, and we always keep in touch.
| A．were | B．have been | C．will be | D．had been |
I _____ some knowledge of cooking just by watching my mother doing it.
| A．put up | B．looked up | C．picked up | D．set up |