Colours can change our moods and make us ________ happy or sad, energetic or sleepy.
A. to feel
B. feel
C. felt
D. feeling
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It’s a good habit ________ breakfast every day.
A. had
B. have
C. has
D. to have
下列关于药物杂质的叙述正确的是()
A. 杂质可以完全除尽
B. 杂质也具有一定的治疗作业
C. 杂质的存在影响药物的纯度,但不会影响其稳定性
D. 杂质的引入在药物生产与贮藏过程中不可避免
将牛奶加热71.7℃15~30s的目的是()
A. 抑制牛奶中的杂菌
B. 防止奶中细菌生长
C. 杀灭奶中病原菌
D. 杀灭奶中所有细菌
E. 使牛奶中不含活菌
Drivers are warned ________ when they are tired.
A. to drive
B. not drive
C. not to drive
D. not driving