I'm going to _____ books. [ ]
A. read
B. reads
C. reading
答案:A
If the barrier of the earthquake-formed Tangjiashan lake _____, a big flood will be caused.[ ]
A. bursts out
B. bursts
C. bursts into
D. burst
蓄电池电解液低于规定标准时,一般应补加()。
A.井水
B.电解液
C.稀硫酸
D.蒸馏水
E.纯净水