题目:Passports are beneficial for______.
A. exchanging currency
B. using a credit card
C. checking into hotels
D. all of the above
喵查答案:D
[解析] 见第三段前两句话。
……继续阅读 »
题目:They built a highway _______ the mountains. A. lead into B. to lead into C. led into D. leading into
喵查答案:D
leading into的逻辑主语是highway,它们之间是主动的关系,所以用动名词形式。 (本解析由学员提供)
……继续阅读 »