问题

Look ! There is a hole the wall. The mouse must run away from here.-I think so. If there is not a picture the hole, we can easily find it.
A:in; in the front of
B:on; in the front of
C:on; in front of
D:in; in front of;
B:on; in the front of
C:on; in front of
D:in; in front of;
正确答案是: