— Food problem is becoming a big one in China!
—I think the food ________ before going to shops or supermarkets.
| A．is checked | B．is checking | C．should be checked | D．should check |
The bus driver always says to us ,“Don’t get off________ the bus stops.”
| A．when | B．while | C．until | D．if |
The weather in Guiyang in summer is ______than that in Tongren. They’re different .
| A．cool | B．muchcooler | C．hot | D．much hotter |
Mr Wang isn’t here, I think he___________ Guiyang.
| A．has gone to | B．has been to | C．goes | D．went |
—I was at the cinema at nine o’clock yesterday evening. What about you?
—I ________ TV at home.
| A．am watching | B．was watching | C．will watch | D．watched |
You ________ stop when the traffic light turns red.
| A．can | B．had better | C．need | D．must |