Please_______(be) careful.空格填什么?

Be careful _(not make ) any mistakes in your homework 空格填什么 Please be careful (not play ) with fire.空格填啥 Be careful,the tiger is very d___.中间填什么? It will be (rain)空格这里该填什么 It___(be) grandma's sixtieth birthday.空格填什么? i should ( be )more careful next time be动词该填什么形式 空格填什么  You should be ________ careful.怎么填 we must be careful () fire 是用介词,用by对么?请问填什么. p_i_t空格填什么字母? 空格里填什么  w_nt_ _空格填什么?