In 1900, the energy derived from burning petroleum was only four percent ______ of coal.
A、thatA
暂无解析
Insummer,shewouldsitinthegardenenjoyingthefreshairandthesmellofthethingsshe______.
Thosewhochangemobilephonestoofrequentlywillhavetopayforbeing______.
Hecomplainedtothebooksellerthattherewereseveralpages______inthebook.
Notallbirdscanfly,______doallbirdsbuildnests.
Ifyou’resittingaroundalonelycampfireatnight,thehowlofawolfcansoundpretty______.
