When a horse’s ears are down, we know that it is ______.

(单选题)—Can I smoke now?—No, you ______. It’s not allowed here. (单选题)—We are going to play against No.3 Middle School.—That’s a s (单选题)Which is ______ park in the city? (单选题)—Can you tell me something about the museum?—Sorry, ______ J (单选题)—Do you know the scientist Qian Xuesen?—Yes, he’s a great __ (单选题)______ chocolate is delicious, I think you’d better not eat (单选题)This math problem is too difficult. Can you show me ______, (单选题)—Is this kind of digital camera made ______ steel?—Yes, and (单选题)75.（ ） (单选题)74.（ ）