_____ do you go to school every day? By bike. [ ]
A. Why
B. What
C. When
D. How
答案:D
How about the two of us ____ a walk down the garden?
A.to take
B.take
C.taking
D.to be taking
下图是某分子的比例模型,黑色的是碳原子,白色的是氢原子,灰色的是氧原子。 该分子是
A.C2H5OH
B.C6H5OH
C.CH3CHO
D.CH3COOH