Food safety is important. Rules must ________ stop people from food pollution.
| A．be made | B．be made to | C．make | D．make to |
Jack usually goes to school by bike, ________ today he walked to school.
| A．and | B．but | C．or | D．so |
My English teacher ________ Mrs Lane now. She often helps me.
| A．were | B．will be | C．is | D．was |
—________ did you start school?
—I started school at five.
| A．How | B．Why | C．When | D．Where |
Robots ________ heavy work on farms in the future.
| A．do | B．will do | C．did | D．does |
Lingling needs some vegetable. She ________ some in the market tomorrow.
| A．buys | B．bought | C．is going to buy | D．buy |