Never______ such a difficult problem. It took me almost half an hour to work it out.
A. had I come across B. I had come across
C. did I come across D. I did come across
— Do you remember the first time we met?
—At that time you ______us a lecture.
A. had givenB. were givingC. have given D. gave
Your _______ as a student will be excellent if you develop a habit of reflecting on how you learn.
A. operationB. performance C. growthD．character
The scientists are beating their brains, trying to ______ a solution to the problem.
A. look up toB. live up toC. come up with D. keep up with
The opening ceremony of the Olympic Games will be broadcast ______ this weekend. You can expect an exactly ______ night.
A. alive; lovelyB. live; livelyC. live; aliveD. lovely; lively
______from the top of the mountain, the village looks like a small box.
A. SeenB. Being seenC. To seeD. Seeing
