–Look! A man is cutting a tree on the moon.--It ______ be true. The teacher said there is no air on the moon.
—I didn’t go to Tom’s birthday party yesterday. What about you?—________, because I was preparing for the exam all the time.
—I think I will recommend David as the chairperson of the club because he is .—I quite agree with you. He is always willing to share his things with others.
—Do you like eating sea food?—Of course. Nothing can be _________, I think.
The doctors in Shenzhen did all they ______ to save Yao Beina, a famous singer, but she still died.
Look. How clean the window is! It ________ just now.A. was cleaned B. is cleaned . has been cleaned D. will be cleaned