皮皮学，免费搜题
登录
搜题
【简答题】
这只箱子占的地位太多了。( space )
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The scientist is very modest. He never______. [ ]
A.
show off
B.
shows on
C.
shows off
D.
show on
【简答题】∫ 10 (2x+ e -x )dx =______．
【单选题】The scientist is known to ______ on the problem for a couple of years.
A.
have been working
B.
be working
C.
be worked
D.
work