《2025年配套综合练习甘肃九年级英语上册冀教版》

B
Laboratory work is your chance to learn science firsthand. It can be fun but you must be careful to prevent injury. Listen closely when your teacher reads and explains the rules before your first lab lesson.


26. Your teacher will probably tell you the rules above ____ the first lab lesson.
A. before
B. since
C. during
D. after(A)
27. Before every experiment, you should ____.
A. taste the chemicals first
B. clean all the apparatus
C. read all instructions carefully
D. report all the accidents to the teacher(C)
28. When you are not sure how to use any apparatus, ____.
A. try them on your own
B. read the rules carefully
C. ask your teacher for help
D. put them back(C)
29. It is clear that you can ____.
A. bring food into the lab
B. enter the lab anytime
C. smell chemicals as you like
D. learn science directly in the lab(D)
30. If you get chemicals on the clothing, you can find ways to solve it in the part ____.
A. Before the Experiment
B. First Aid
C. During the Experiment
D. After the Experiment(B)

答案： 26. A 27. C 28. C 29. D 30. B