Keys should never be hidden around the house since thieves _____ know where to look.
| A．virtually | B．variously | C．unavoidably | D．invariably |
．—Remember the first time we met?
—Sure．You ____in the supermarket．
| A．shopped | B．have shopped | C．had shopped | D．were shopping |
In the countryside, ____car is not yet ____popular means for transportation．
| A．/; a | B．a; the | C．the; / | D．the; a |
It's said that going to bed early and getting up early ____a widely accepted good habit．
| A．are | B．is | C．were | D．was |
．____is known to us is that China has won five gold medals in the 2010 Winter Olympic Games.
| A．It | B．As | C．What | D．That |
Medicine should be placed ____children's reach to make sure of safety．
| A．with | B．within | C．out | D．beyond |