these are dictionaries提问dictionaries

these are dictionaries提问dictionaries These are dictionaries.对dictionaries提问 Dictionaries are ... why are dictionaries useful? how dictionaries are made ( )of these English-Chinese dictionaries are not mine. There are some dictionaries in these bags?(单数形式) These dictionaries are mine.（一般疑问句 否定回答） Are these English dictionaries?作肯定回答 _________,they_________ ________ dictionaries are very popular with students these d their dictionaries are (in the classroom)对括号部分提问 dictionaries are such useful books.