Now I can turn around.[ ]
A. 向前走
B. 向后走
C. 转身
答案：C
Advertisements are powerful and some companies try to mislead us, so we ____ be careful when
reading them.[ ]
A. can
B. may
C. must
D. would
陶瓷锦砖的接缝材料是（）。
A．石灰砂浆
B．混合砂浆
C．素水泥浆
D．石灰浆
