The earth is a planet and it around the sun.
A. goes . B. go . C. will go . D. went
（2017年四川成都）--Did you hear someone knock at the door just now?
-- Sorry. I ______ to my friend on the phone.
A. was talking B. talked C. am talking
In the past few years there ________ great changes in my hometown.
A. had been B. have been
C. were D. are
Betty ___________ hard since last term. That’s why her exam results are so good!
A. has worked B. will work C. worked D. was working
Sue wasn’t happy because she ___________ the concert given by her favorite singer.
A. misses B. missed C. will miss D. is missing
Wow! You ________ dinner! Let's eat now.
A. cook B. are cooking C. will cook D. have cooked
