I just don’t understand _______ that prevents so many Americans from being as happy as one might expect.
| A．why it does | B．what it does |
| C．what it is | D．why it is |
— Would you mind my coming over and having a look at your new garden? My little son’s curious about those roses you grow．
—________．You are welcome．
| A．Yes, I do | B．Never mind | C．Yes, please | D．Not at all |
It is the _________ in Britain that young people often do not shake hands when they meet someone for the first time.
| A．custom | B．habit | C．hobby | D．favour |
Rose found her toy bear _______ under the chair.
| A．hiding | B．to hide | C．having hidden | D．hidden |
As we joined the big crowd, I got ________ from my friends.
| A．lost | B．separated | C．spared | D．missed |
________ theme of the Shanghai Expo is “Better city, better life”． It will send _____ message to people around the world to care about the places where they live．
| A．/…a | B．The…a | C．A…the | D．/…the |