主讲教师：林斌北京八十中学英语特级教师
题一：You'll have to attend the ceremony _______ you're free or busy.
A. whoever B. whatever C. whether D. no matter
题二：We’ll continue our work _______we can find the necessary tools or not.
A. whichever B. wherever C. whenever D. whether
题三：－How long have you been studying in this senior high school?
－Less than two years and a half.
－So it will be half a year _______ you graduate from this school.
A. when B. after C. before D. since
题四：—How long do you think it’ll be _______ I can go back to work?
—Well，you’ll be feeling much better by next weekend.
A.before B.when C.until .that
