Excuse me. I _______ I was blocking(挡) your way.
| A．didn't realize | B．don't realize |
| C．haven't realized | D．wasn't realizing |
—Why is Pierre so ?
—Don’t you know? He has won the first prize in the school painting competition.
| A．worried | B．sad | C．excited | D．embarrassed |
—Would you like to tell me which sweater you like, the red one or the blue one?
—_________. I like the green one.
| A．Both | B．Each | C．None | D．Neither |
— I have failed. I really don't know why I did so badly.
—________ Just try to do it better next time.
| A．Look out！ | B．Don't lose heart！ | C．You're hopeless. | D．Can't you be more careful? |
________ I got on the bus, he got off.
| A．As | B．While | C．Until | D．Till |
Not only the kids but also the teacher ________. We are worried because time is running out.
| A．has lost | B．has gone missing | C．have lost their way | D．have disappeared |