1. too much carbon dioxide in the air can be =... for humans to breathe. a. poisonous b. unfriendly c. healthy d

Question

1. too much carbon dioxide in the air can be …………… for humans to breathe.
a. poisonous b. unfriendly c. healthy d. poison
2. the new invention could have a wide range of ………………..in industry.
a. applications b. concerns c. goodness d. advance

havu · Answer

1. too much carbon dioxide in the air can be …………… for humans to breathe.
a. poisonous b. unfriendly c. healthy d. poison
2. the new invention could have a wide range of ………………..in industry.
a. applications b. concerns c. goodness d. advance

giangnguyen · Answer

1. A   2. D

1. too much carbon dioxide in the air can be =… for humans to breathe. a. poisonous b. unfriendly c. healthy d

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