You’ve never told me why you didn’t come to my birthday party， _____?

Feed plants and they grow; （ ） them and they suffer.

Each car sold in this specialized shop comes with a one-year （ ）.

Proper_____can ease people’s relationship and make their conversation more pleasant.

By this time next week, the winners _____ their awards.

—Are you （ ）? —No, I’m serious.

The defense computers calculate way to （ ） the enemy missiles.

Harmonious marriage, however, does not necessarily （ ） much sharing of interests and responsibilities.

It is （ ） impossible to work with this noise around.

Today Bob was late again for class because he overslept(睡过头), but he （ ） an excuse of being ill.

I love thinking of new designs. It keeps my mind clear and active and fills my retired life with （ ）.

（ ） that the trade between the two countries reached its highest point.