Select the most appropriate option to fill in blank number 4.
They also live in the shadows of trees. We (4) __________ cutting trees to save nature.
A.may stopped
B.can stopped
C.have stop
D.should stop✓ Correct
Explanation
'Should stop' is the grammatically correct modal verb phrase here, expressing a recommendation or obligation. The other options pair modal verbs incorrectly with past participle forms.
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