He bought the apple at two dollars by ______.

(单选题)The palace caught fire three times in the last century, and  (单选题)It is widely acknowledged that students should be ______ in (单选题)—Can you help me to translate it into English?—______ (单选题)Graduation is a good time to thank those who have helped you (单选题)What’s the ______, in your opinion, of helping him if he doe (单选题)By taking up the offer, the voucher holders can choose to __ (单选题)What right do the B&Bs reserve? (单选题)How much should be paid for a two-night stay in October 2012 (单选题)The voucher can be used for a stay at the chosen B&B on ____ (单选题)What is the main purpose of the author writing the text?