---Look at these tracks. It _____ be a wolf.”
---Don’t be so sure. I think it _____ be a fox.
A. must; could B. may; might C. need; must D. could; need
The young pianist is very excited because the concert given by him has never been ____ .
A. successful B. more successful
C. most successful D. the most successful
---When shall we restart our business?
--- Not until we our plan.
A. will finish B. are finishing C. are to finish D. have finished
In front of our house many beautiful flowers when my grandparents were still alive with us.
A. did; grow B. grew; / C. had; grown D. grow; /
I don’t think anyone can finish the experiment, ____?
A. do I B. can they C. can’t they D. don’t I
Now there is just one point I wish you to make clear.
A. where B. that C. when D. what
