_____ about the safety of her son, John’s mother looked upset．
| A．Concerning | B．Concerned | C．To concern | D．Concern |
----- There must be a dozen pens in this house but I can never find one when I need one. ---- Keep looking. ____is sure to turn up.
| A．One | B．It | C．That | D．This |
Who can you turn to in time of danger, it not___ .
| A．any | B．us | C．we | D．ours |
---- Which of the two books do you want?----- I want____ . Please show me ____.
| A．none; another | B．all; the other | C．neither; the other | D．neither; another |
---- Did ____get through the driving test?----No,___ . A few failed.
| A．everybody; not all | B．anybody; no one | C．everybody; none | D．anybody; not all |
He and his brother are as tall as ____.
| A．each of them | B．themselves | C．each other | D．each other’s |