It suddenly __________ me how we could improve the situation. [ ]

The failure to _____ the basic values and laws of a country harms the survival of its democracy (民主).

Purchasing houses that are environmentally responsible is a good investment for____ about their own health and well-being of the earth.

John has got a fever these days and he said he didn’t want to see a doctor, but I’m afraid hehas no ________. [ ]

We’ll take a honeymoon trip to Venice. Would you like to my dog for me while we are away?