单项选择题
Which of the following choices can help you fly to Beijing at the lowest cost
单项选择题 【B2】
单项选择题 Steve: Hi, my name is Steve. It"s nice to meet you. Jack: ______ I"m Jack.
单项选择题 If you decide to take a flight to Hanoi, you might have to pay ______ altogether for the flight.
