When the clerk saw a kind face wrinkled in an apologetic smile, she stood rooted to the ground ,_________whether to stay or leave.
A. wondering
B. wonders
C. having wondered
D. Wondered
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Homework_________, we went home happily.
A. be finished
B. finishing
C. having finished
D. having been finished
Much time_______ sitting at a desk , office workers are generally troubled by health problems.
A. spend
B. spent
C. spends
D. being spent
_________in painting, John didn't notice evening approaching.
A. To absorb
B. Absorbs
C. Absorbed
D. Absorbing
________for two days, Steve managed to finish his reports on schedule.
A. Having worked
B. Worked
C. To work
D. Being worked
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