13. The frog was sitting___________ on a lily pad. Suddenly, a mosquito flew by. The frog snatched the mosquito with its tongue and ate it. It then sat still again, waiting for its next prey.
(A) motion
(B) motionless
(C) motionlessly
(D) motionlessness
詳解 (共 1 筆)
未解鎖
The frog was sitting...
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