---____________ is your telephone number?---It's 64863393.
A：How
B：What
C：How many
D：What color
34÷7=____
84÷5=____
29÷4=____
—I've been working on a research report, which was ________ easy. Which of the following can't be put in the blank?
秦朝是我国历史上最早实行郡县制的朝代。____
