【小题1】Can you take care of your sister?（同义句转换）
Can you look after What’s wrong your sister?
【小题2】What is the matter with you? （同义句转换）
took me to clean rides his/a/ the bike with you?
【小题3】I spent half an hour cleaning my room. （同义句转换）
Itcame/got/went back to How often does take half an hourHow long my room.
【小题4】Jim goes to school by bike every day.（同义句转换）
Jim to school every day.
【小题5】They returned to their hometown last week. （同义句转换）
They their hometown last week.
【小题6】David takes a shower once a day in summer.（对划线部分提问）
David a shower in summer?
【小题7】She is going to stay there for a week.（对划线部分提问）
is she going to stay there?
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解析：
【小题1】本题的含义为你能照顾你的妹妹吗？look after也可以表示照顾，故本题空格处填look after。
【小题2】本题的含义为你怎么了？对某事情况提问的可用what’s wrong，故本题空格处填What’s wrong。
【小题3】本题的含义为我花费了1个小时打扫房间，也就是说打扫房间花费我1一个小时，可用take sb to do sth的结构为表示，本题表示过去，故用take的过去式took，故本题的空格处填took me to clean。
【小题4】本题的含义为吉姆每天骑自行车上学，ride a bike可以表示骑自行车的含义，故本题空格处填rides his/a/ the bike。
【小题5】本题的含义为他们上周返回到家乡，e back to+地点，也可以表示此意，本题表示过去，故用came，故本题的空格处填came/got/went back to。
【小题6】对频率提问的用多久how often，后跟一般疑问句，本题用助动词does构成，故本题空格处填How often does take。
【小题7】对时间长度提问的用疑问短语多长How long。