夏天,人们常常会在河边看到“蜻蜓点水”的现象,这是蜻蜓在[ ]
A.喝水
B.产卵
C.练习飞行
D.捉河里的小动物
答案:B
Would you like to go to the concert with me? No, I would rather ___.
A.to stay at home
B.stay at home
C.staying at home
D.will be staying
总费用比率