Fred is second to none in English in our class, but believe it or not, he _____ passed the last exam.

  She devoted herself ________to her research and it earned her a good reputation in her field.

.If what your friend comes up with surprises you，don't reject it immediately._____，imagine that it is true.

Everyone was on time for the meeting, ______Chris, who’s usually ten minutes late for everything.

Joe worked so hard that ________ he made himself ill.