By the time he ____ at the party, all the other guests ____ playing games.
| A．arrived; had begun | B．arrived; began |
| C．had arrived; began | D．had arrived; have begun |
Every man worker and every woman worker _____ free medical care. At Christmas each boy and each girl ___ given a present.
| A． enjoy; is | B． enjoy; are |
| C．enjoys; are | D． enjoys; is |
Don’t be worried. I’ll ________ your pet dog when you’re away.
| A．deal with | B．care about |
| C．look into | D．care for |
Only after the woman had her own child ________ how difficult it was to be a mother.
| A．she realized | B．had she realized |
| C．she had realized | D．did she realize |
— What made you so unhappy? — ______ my new bicycle.
| A．Lost | B．Losing | C．Lose | D．I lost |
The determined mother has devoted all she has to ________ her son out of trouble.
| A．helping | B．help |
| C．have helped | D．having helped |