--What on earth are the police busy with? ---They have been looking into how the plane crash _______.
#71465
A
came out
B
came up
C
came down
D
came about
推荐题目
Though the girl      to learn Japanese, she couldn’t catch up with her classmates.
#72891
A
made effort
B
made an effort
C
took every effort
D
gave her efforts
This morning Tom got up ealier ___ be late for school.
#82254
A
in order to
B
in order to not
C
so as to
D
so as not to