We believe that China will become one of in the world．（ ）
A．the strong countries
B．the strongest country
C．the strongest countries
D．the strong country
I'm always a little nervous when I answer questions in class．
________． Believe in yourself!（ ）
A．That's rightB．Take it easy
C．Take it seriouslyD．Have a point
The Tokyo Olympics will be ________ because of the disease around the world． （ ）
A．put upB．put offC．put onD．put away
What do you usually do in your spare time？
I often go to our community library． It ________ for two years in order to encourage us to read more．
（ ）
A．opensB．has opened
C．has been openedD．has been open
Although the man is in his eighties， he grows vegetables ________ in his garden． （ ）
A．in publicB．in personC．in silenceD．in fact
It is so hot today． Why not swim in the river？
No， we can't swim in the river． Our teachers and parents always warn us ________in the river． It's too dangerous．（ ）
A．to not swimB．swimming
C．not to swimD．not swimming