外研版情态动词用法详解一、选择题1.If you buy your mum an iRobot floor cleaner, she ________ sweep the floor every day
A.can’tB.mustn’tC.needn’tD.shouldn’t2.To my joy, we_________ go to the bank
Mary has lent us some money
A.shouldn’tB.needn’tC.couldn’tD.wouldn’t3.—Mum, why do I have to wear a mask before entering the supermarket
—For your health and safety, you ________ be too careful
A.shouldn’tB.can’tC.mustn’tD.needn’t4.—Will my car be ready by the end of the day
—It ________ be, sir
I’ll call if there’s any problem
A.mustB.couldC.shallD.should5.Our Chemistry teacher always tells us we ________ be too hardworking before the exams
A.mustn’tB.shouldn’tC.needn’tD.can’t6.—Dad, must we wait until the light becomes green
—Yes, I am afraid we ________
That’s the traffic rule
A.mayB.canC.have toD.need7.— __