问题

They had to_________ before they finishedthe course because they were not well disciplined.

A:drop in
B:dropout
C:drop off
D:dropby

正确答案是：

同类题型

1Jim wants to play football, _______

下列句中加点词语发生活用的情况不同其它三项的是（）

We haven’t settled the question of it is necessary for him to study abroad.

__to the victims of the earthquake, you cancontact the local charity organizations

’s succeeded in many fields but hiswife is an ordinary woman, ___________