My aunt has a nice house _____ many treesand flowers around it.

there a ____ to the time that I canstay here — Yes, you must leave here before he comesback.

We should _____ the power when our TV or computer is not used.

Lily didn’t come to the party last Sunday. ____，she would have made the party more exciting .

It is believed that _____ European scientist invented _______.