Food ___in a cool place in summer.
A: must keep
B: mustn't keep
C: must be kept
D: mustn't be kept
A: must keep
B: mustn't keep
C: must be kept
D: mustn't be kept
举一反三
- Themedicine（）cool,cleananddry. A: must keep B: must be kept C: must be keep D: must be in
- The medicine （） cool, clean and dry. A: must keep B: must be kept C: must be keep D: must be i
- The classroom must ______. A: be kept clean B: keep cleaned C: kept clean
- Our room must ( ) clean. A: to keep B: be keeping C: be kept D: keep
- —Mustwefinishtheworkbeforedark,sir?<br/>—No,you_____.Butyou_____tomorrow. A: needn’t;must B: mustn’t;must C: needn’t;need D: mustn’t;need