Ôn thi Cấp tốc 789+ vào 10 môn Tiếng Anh (Đề 3)

Uncover the jar (39) _______ a few seconds, and then recover it again.

39/50

Uncover the jar (39) _______ a few seconds, and then recover it again. Put the jar in refrigerator.

since

with

at

for