单项选择题

A．By burying a water-filled pot among the plants.
B．With surface irrigation.
C．With spray irrigation.
D．By digging a ditch along the plants.
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单项选择题
A．Buy a racing bicycle.B．Replace the tires on his bicycle.C．Buying a used bicycle.D．Sell his old bicycle to the shop.
A．Buy a racing bicycle.
B．Replace the tires on his bicycle.
C．Buying a used bicycle.
D．Sell his old bicycle to the shop.
单项选择题
A．Hop carefully.B．Walk heavily.C．Float through the air.D．Ride in a spaceship.
A．Hop carefully.
B．Walk heavily.
C．Float through the air.
D．Ride in a spaceship.
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