6、e.—Goodidea!A.somethingusefulB.usefulsomethingC.anythingimportant()23.— Peter has made great progress in math recently. — _________ , and so have you. A. So he does B. So he has C. So has he ()24.—Jane,howlonghaveyoubeeninChina?—IheretwoyearsagoandIinChinafortwoyears.A.cam