【单选题】 Container-grown plants can be planted at any time of the year, but ________in winter.
A.should be
B.would be
C.preferred
D.preferably
网考网参考答案:D
网考网解析:
词义辨析。should be/would be应是;preferred首选的(adj.);preferably更适宜,最好是(adv.);因此应填D。
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