Question

A lot of trees________ around here every year, and we can  enjoy fresher air now.

A．were planted

B．are planted

C．will planted

D．are planting

Answer 1

B

句意：每年这附近都种许多树，因此我们现在能够享受到新鲜的空气了。结合语境可知前文描述的是经常性动作，故用一般现在时态。主语是动作对象，故用被动语态。选B。