Both of my sisters are teachers. One is a Chinese teacher, and ________ teaches English.
| A．another | B．the other |
| C．other | D．the others |
We __________ our breakfast. We __________it at school at 6:30.
| A．have had; have had | B．have had, had |
| C．had, have had | D．had, had |
The students are clever. They have no problems _____ out the math problem.
| A．work | B．working | C．works | D．to work |
—Do the dishes,Tom, or I will tell Mom!
--Mind your own_____,Mary!
| A．action | B．way |
| C．business | D．duty |
I think this problem is much more difficult than that one,______?
| A．don’t I | B．do I |
| C．is it | D．isn’t it |
Mother told me sound____slower than light.
| A．traveled | B．travel |
| C．travels | D．traveling |