29. According to the air traffic rules, you ______ switch off your mobile phone before boarding.
A. may B. can C. would D. should
According to the air traffic rules,you should switch off your mobil phone before boarding.
30. My sister, an inexperienced rider, was found sitting on the bicycle
______ to balance it.
A. having tired B. trying C. to try D. tried
My sister ,an inexperienced rider,was found sitting on the bycycle trying to balance it. |