Doctors say that exercise is important for health, but it _______ be regular exercise.
A.can B.will C.must D.may
Doctors say that exercise is important for health, but it _______ be regular exercise.
A.can B.will C.must D.may
C
考查情态动词。Can一般表示“可能,或能力”;will表示“意志”;may表示“许可,可能”;must表示“必须”。句意为:医生说锻炼对身体重要,但是必须是有规律的锻炼。