I wish I _____ a big house.[ ]
A. have
B. had
C. to have
D. having
答案：B
(2013·高考北京卷)Don’t turn off the computer before closing all programs，________you could have problems.
A．or
B．and
C．but
D．so
蒸压加气混凝土砌块与普通烧结砖相比，其特点是( )。
A．导热性能好 B．防潮性能好 C．抗腐蚀性能好 D．自重轻
