If plants are to grow, they______nitrogen.A、have toB、hadC、havingD、must haveD

游客2024-01-02 50

问题 If plants are to grow, they______nitrogen.

选项 A、have to
B、had
C、having
D、must have

答案 D

解析 In this future real conditional sentence, must have is the correct verb form in the result clause.

转载请注明原文地址:http://tihaiku.com/zcyy/3327816.html

相关试题推荐

随机试题

最新回复(0)

Scientistshaveknownforsometimethatcertainplants,calledhyperaccumu-