There ______ no treest. A. were B. has C. was
He can ____ Chinese. A. say B. tell C. speak
I ___ a robot.A. has B. have C. having
____ are hard-working. A. They B. Is C. Am
____ they helpful at home? A. Am B. Is C. Are
Chen Jie ____ polite. A. am B. is C. are