— Please turn off the radio, grandma ___now.

—OK, I'll do it right now.

Which is not correct after being put in the sentence?

_______ to turn off the radio before you go out.

用括号内所给动词的正确形式填空（1’×5）

49. Isn’t it strange that the cat is used to ________(lie) beside the dog peacefully?

50. I believe that an important moment like this should ________( not forget).

51. Turn off the radio,dear. Baby is sleeping.

   There is no need. He ________(wake) up.

52. What is he busy doing?

    Doing the experiment ________(complete) the science project.

53. The project they had devoted up to two years to ________(choose) as the best one at the      conference.

— Please turn off the radio, grandma ___now.

— OK, I'll do it right now.

A.  is sleeping B. will sleep C. slept D. sleeps