________ you find the right way to study ________ able to study well.
A．Only if; will youB．Unless; you will
C．Only if; you willD．Unless; will you
Jack’s shoes looked the same as Peter’s, but they cost ________ his.
A．as much twice asB．twice as much as
C．much as twice asD．as twice much as
—They are quiet, aren’t they?
—Yes, They are used ________ at meals.
A．to talkB．to talking
C．to not talkingD．not to talk
________ around the beautiful campus, they were taken to the classroom to observe a maths lesson.
A．To be shownB．Having shown
C．Having been shownD．To show
I would rather you _________ at home tomorrow.
A．to stayB．stayed
C．stayD．had stayed
Which of the following sentences is not correct?
A．I find it worthwhile to take part in the anti-smoking campaign.
B．The new house really didn’t worth so much money.
C．His suggestion is worthy of consideration.
D．He is a gentleman worthy to be respected.
