皮皮学，免费搜题
登录
搜题
【简答题】
根据课文填空 Water had also appeared on other planets like Mars but, 1 the earth,it had 2 later. It was not immediately obvious 3 water was to be 4 to the development of life. 5 many scientists believe is that the continued 6 of water allowed the earth to dissolve 7 gases and acids into the oceans and seas. This produced a 8 reaction, 9 made 10 p ossible for life to develop.
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】— Why does she look so tired? — She ____homework all the morning and she still hasn't finished it. [ ]
A.
is doing
B.
has done
C.
has been doing
D.
was doing
【单选题】—Lily dances so well . Where was she trained? —She learns all by herself .She _______goes to any training class.
A.
usually
B.
often
C.
even
D.
never
【单选题】She has _____she remembers all the names of the students she has taught.
A.
so good memory that
B.
such a good memory that
C.
such good memory that
D.
good memory
【单选题】– Why does she look so tired? -- She ________ all the morning and she still hasn’t finished it.
A.
cleaned
B.
was cleaning
C.
has been cleaning
D.
has cleaned
【简答题】为什么要进行井下作业有关设备的试压?
相关题目：