--- Hi, David. _______do you go to see your grandparents?
---About three times a month.
A. How long
B. How often
C. How soon
The year of 2013 saw the_______ air pollution in China for 52 years.
A. bad B. worse C. worst
--- Do you know if Tom_______ to Lily’s birthday party last Sunday?
--- Sorry, I've no idea.
A. is invited
B. was invited
C. invited
—Which drink would you like, fruit juice or milk?
—_______, because I have a stomachache.
A. Neither B. Either C. Both
It was reported that China's first moon car “Yutu" landed on the moon successfully _______December 14, 2013.
A.in B.on C.at
---What do you think of A Bite of China on CCTV?
---It's one of _______ best programs that I've ever seen.
A.a B.the C./