Answer: A) We would do better at the craft fair if our booth were a bit bigger.
Explanation: conditional mood is the form of a verb which is used to make requests or expression of under what condition something would happen. From the given options, the sentence that is written correctly in the conditional mood, is the corresponding to option A, because it has the condition "if our booth were a bit bigger" and the consequence "we would do better at the craft fair."
The presence or introduction into the environment of a substance which has a harmful or poisonous effects
A participle has the form of verb + -ing. So the only such word here is 'smiling' that is the participle in this sentence. It modifies 'woman', that is, it refers to how the woman opened the door - smiling pleasantly.
The answer should be D; All of these
