______ yourself, you should never put convenience before safety.
| A．Protecting | B．Having protected | C．Protect | D．To protect |
He __________ a spelling mistake on the front page cbecause he finished his English paper in a hurry.
| A．noticed |
| B．remarked |
| C．overlooked |
| D．undertook |
My memory of the happy days we spent together will not __________ as time goes by.
| A．look ahead |
| B．pay off |
| C．fade out |
| D．take in |
Suddenly she began to __________, holding herself in as if weeping was a shame.
| A．smile |
| B．laugh |
| C．sing |
| D．sob |
—Tom, you are caught late again.
—Oh, __________.
| A．not at all |
| B．just my luck |
| C．never mind |
| D．that's all right |
I can judge that they __________ the enormous risks involved.
| A．skimmed |
| B．observed |
| C．overlooked |
| D．glanced |