21. ---I was searching for ________information on ________ Internet when suddenly the power was off.
A. an; an B. an; the C. /; the D. /; /
22. Tina has got____ with office work and is looking forward to _____an exciting job.
A. boring; find B. bored; finding. C. bored; find D. boring; finding
23. ----My room got very cold at night.
----______.
A. So is mine. B. So mine is. C. So does mine. D. So mine does.
