_______ that all the doors and windows are locked before you leave the house!
I’m not sure my pen pal can come here tomorrow.A.whether B.when C.what
—Which one is ,the TV or the Internet ?—The Internet , I think .A. very usefulB. more usefulC. much useful
Jack has only one bike with his brother , so they the bike with each other .A. share B. stop C. prevent
—___________lovely day! Let’s go for a picnic, shall we?—Good idea!A. What B. How C. What a
—Must we finish the homework right now ?—_____________. You can go and play basketball.A.No , you don’tB. No , you needn’tC. Yes, you must.