They _ (investigate) the causes of gas explosion since last week.这里怎么填?

They _ (investigate) the causes of gas explosion since last week.这里怎么填? investigate是什么意思 they are _(coach) They had a great time there.=They _ _ there.=They _ _ there They usually exercise ._ _ they usually (对打“”部分提问) 英语翻译They are looking fou _ _ _ They like _ (make) kites they are very _(love) A:Look at the boys!Are they going canping?B:_,_ _.They are_ _. investigate什么意思 他们有物美价廉的帽子 They have hats _ _ _ _ _ If students study hard,they _ _ _ _ _ _the exams. 把英语句子该成一般疑问句没空一词They boys are in the classroom_ _ _ _ _ They go to school every_ _ _ _ _ _ Jenny has many books _ _ _ _ _ He does his homework ever day_ _ _ _ _ _ _ She studies English hard._ _ _ _ 英语翻译They _ nine _ _ the film.It _ _ nine _ to _ the film. When's Halloween Is' on the _ _ _.What _ people usually _ They _ _ _ _ and go to parties.急死了,明天交, They can run fast（run fast划线）(对划线部分提问)_ _ they _. They play volleyball for one hour.(对划线部分提问) _ _ _ they play volleyball?----------------- They _ _ _ (在一起)since they set up their own music band