Does she have any problems ______ her lessons?[ ]
A .in
B. to
C. with
D. for
答案:C
14.After a short rest, he came back to he had stopped and continued reading.
A.where
B.which
C.in which
D.that
每次爆破的方数不多,要全靠人工清除,且不利于爆破能量的利用的爆破方法是( )。
A.猫洞炮
B.钢钎炮
C.深孔爆破
D.药壶炮