Her little son fell off the boat into the water due to her carelessness. The mother couldn’t help _____because she couldn’t help _____ her son out of the danger.
| A．crying; to save | B．crying; saving |
| C．to cry; to save | D．cry; saving |
Mr. Keller ______ forty cigarettes a day until he gave it up.
| A．had smoked | B．smokes | C．have smoked | D．smoked |
--- Do you know that man?
--- Not really, just a nodding _______.
| A．acquaintance | B．participant | C．relation | D．frequent |
Please remember _____ wins you respect is not your background but your knowledge and virtues.
| A．that | B．what | C．which | D．where |
I find it astonishing that she _____ treat you like this in public.
| A．should | B．must | C．may | D．would |
Willie has complained to the sales manager about the PC he bought _____ screen exploded for no reason.
| A．which | B．where | C．whose | D．when |