—The trousers are $30.
—I’ll take______.[ ]
A. it
B. he
C. they
D. them
答案：D
There are many buses running in the street. Don't go ______ it. [ ]
A. across
B. through
C. over
继发性肺结核的病理特点有（）.
A.病灶多从肺尖部开始
B.常循血道播散
C.常循淋巴道播散
D.常循气道播散
