We mustn't ______ off the wall.
A. jump
B. be jumping
C. are jumping
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Look! The aeroplane ________ over the river.
A. flying
B. is flying
C. fly
It is eight o'clock. The keyboard operator ________ a letter.
A. type
B. are typing
C. is typing
--- ______ they _____ the dishes? --- Yes, they are.
Are, washing
B. Is, washing
C. Do, wash
They ______ now.
A. is shaving
B. are shaving
C. shaving