单项选择题
A．expensive and boring B．interesting and enjoyable C．time-consuming and inconvenient D．neither interesting nor enjoyable
A．vegetables need little care while growing B．vegetables can be grown on almost any kind of soil C．vegetable gardening is an indispensable part of life for urban and suburban people D．vegetable gardening is a good pastime for retired people
A．can be large B．must be large C．can not be large D．must not be small