用方框内所给词的适当形式填空。
produce, increase, warm, Africa, convenient
9×3＋5＝____
9×（3＋5）＝____
请你来当邮递员连一连.
The fire started on the second floor and it wasn't long ______ the whole building was burned down.
如图所示的弹簧测力计的示数是____ N。
