Would you like to go to aquarium with me tomorrow ?—Sorry . I there twice this year and don’t want to go there again.

I ________ clean my room on weekdays. I have no time.

If Tom ________ the game, we’ll give him a surprise.

If a=”4,” b=”5,” what’s the answer to the question “ a + 2ab +1 =?”—.

With the help of the smart phones, you ____ video chat with your friends on the phone.