26、At the conference, political leaders from many countries promised to work together to defend the world _____ terrorism and other threats.
A. for B. against C. beyond D. without
25、Seldom ______ breakfast when I was a middle school student.
A. had I B. I had C. did I have D. I did have
24、I was surfing the Internet there was a knock on the door.
A．while B．however C．when D．as
23、---Have you heard the latest news? ---No, What ________?
A. is it B. is there C. are they D. are those
22、Some pre-school children go to a day care center, __________ they learn simple games and songs.
A. then B. there C. while D. where
21、The manager suggested an earlier date ____________ the meeting.
A. on B. for C. about D. with
20、---It’s a long time since I saw my sister.
--- _______________ her this weekend?
A. Why not visit B. why not to visit
C. Why not visiting D. Why don’t visit
19、---The last one __________________ pays the meal.
---Agreed!
A. arrived B. arrives C. to arrive D. arriving
18、I won’t call you, ________ something unexpected happens.
A. unless B. whether C. because D. while
17、---How’s your tour around the North Lake? Is it beautiful?
---It ________ be, but it is now heavily polluted.
A. will B. would C. should D. must