There is a computer _______ the desk.
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—Welcome to Beijing!—________.
A. Not at all
B.That’s all right
C.Thank you
He is very tired. He doesn’t want to do ______.
A.something
B.anything
C.everything
Let’s _______ sports.
A. playing
B. play
C. to play
I found it _______ to work out this math problem in one minute.
A. easily
B. quickly
C. easy